{"cik":"0001892316","entityType":"operating","sic":"8000","sicDescription":"Services-Health Services","ownerOrg":"08 Industrial Applications and Services","insiderTransactionForOwnerExists":0,"insiderTransactionForIssuerExists":1,"name":"Longduoduo Co Ltd","tickers":["LDDD"],"exchanges":["OTC"],"ein":"372018431","lei":null,"description":"","website":"","investorWebsite":"","category":"Non-accelerated filer<br>Smaller reporting company<br>Emerging growth company","fiscalYearEnd":"0630","stateOfIncorporation":"NV","stateOfIncorporationDescription":"NV","addresses":{"mailing":{"street1":"G3-5-8016, SHUI'AN TOWN, RUYI HEADQUARTE","street2":"HOHHOT ECONOMIC DEVELOPMENT ZONE","city":"HOHHOT","stateOrCountry":null,"zipCode":"010000","stateOrCountryDescription":null,"isForeignLocation":1,"foreignStateTerritory":"INNER MONGOLIA","country":"China","countryCode":"F4"},"business":{"street1":"G3-5-8016, SHUI'AN TOWN, RUYI HEADQUARTE","street2":"HOHHOT ECONOMIC DEVELOPMENT ZONE","city":"HOHHOT","stateOrCountry":null,"zipCode":"010000","stateOrCountryDescription":null,"isForeignLocation":1,"foreignStateTerritory":"INNER MONGOLIA","country":"China","countryCode":"F4"}},"phone":"86 (0472) 510 4980","flags":"","formerNames":[],"filings":{"recent":{"accessionNumber":["0001213900-26-105343","0001213900-26-103959","0001213900-26-100300","0001213900-26-054721","0001213900-26-013420","0001213900-25-108744","0001213900-25-091988","0001213900-25-042963","0001213900-25-030794","0001213900-25-022149","0001213900-25-013782","0000000000-25-001151","0002053450-25-000001","0001213900-25-006959","0000000000-25-000812","0001213900-25-003731","0001213900-24-113653","0001213900-24-097793","0001213900-24-087710","0001213900-24-087709","0001213900-24-082961","0001213900-24-082959","0001213900-24-069976","0000000000-24-007303","0000000000-24-006267","0001213900-24-041102","0000000000-24-004257","0001213900-24-026396","0001213900-24-018218","0001213900-24-010983","0001213900-24-003079","0001213900-24-003077","0001483401-23-000003","0002004355-23-000001","0001213900-23-094955","0002003997-23-000002","0002003997-23-000001","0001892291-23-000003","0001892291-23-000002","0001892291-23-000001","0001213900-23-092308","0001213900-23-089955","0001213900-23-088571","0001213900-23-086539","0001213900-23-086498","0001013762-23-002262","0001213900-23-080530","0001213900-23-079700","0001213900-23-069631","0001213900-23-053203","0001213900-23-041711","0001213900-23-039458","0001213900-23-016633","0001213900-23-011005","0001213900-22-076022","0001213900-22-071476","0001213900-22-063656","0001213900-22-059552","9999999995-22-002222","0001213900-22-042791","0001213900-22-042652","0001213900-22-042157","0001213900-22-035814","0001213900-22-035812","0000000000-22-006580","0001213900-22-031664","0001213900-22-031662","0000000000-22-004856","0001213900-22-020272","0001213900-22-020270","0000000000-22-001457","0001213900-22-002920","0001213900-22-002918","0000000000-21-014701","0001213900-21-057997"],"filingDate":["2026-09-30","2026-09-28","2026-09-16","2026-05-12","2026-02-09","2025-11-12","2025-09-26","2025-05-14","2025-04-11","2025-03-10","2025-02-14","2025-02-03","2025-01-31","2025-01-27","2025-01-24","2025-01-15","2024-12-31","2024-11-14","2024-10-15","2024-10-15","2024-09-30","2024-09-30","2024-08-16","2024-06-28","2024-05-31","2024-05-09","2024-04-18","2024-03-27","2024-02-29","2024-02-07","2024-01-12","2024-01-12","2023-12-27","2023-12-13","2023-12-12","2023-12-11","2023-12-11","2023-12-11","2023-12-11","2023-12-11","2023-12-04","2023-11-27","2023-11-20","2023-11-14","2023-11-14","2023-10-06","2023-09-28","2023-09-27","2023-08-22","2023-06-30","2023-05-22","2023-05-15","2023-03-02","2023-02-14","2022-11-30","2022-11-14","2022-10-13","2022-09-28","2022-08-02","2022-07-29","2022-07-29","2022-07-28","2022-06-29","2022-06-29","2022-06-16","2022-06-08","2022-06-08","2022-05-03","2022-04-18","2022-04-18","2022-02-04","2022-01-21","2022-01-21","2021-12-07","2021-11-10"],"reportDate":["2026-06-30","2026-06-30","2026-09-14","2026-03-31","2025-12-31","2025-09-30","2025-06-30","2025-03-31","2025-04-02","2025-03-10","2024-12-31","","2024-09-25","","","2025-03-10","2024-12-30","2024-09-30","","2024-06-30","2024-06-30","2024-09-25","2024-08-12","","","2024-03-31","","2023-06-16","2024-02-29","2023-12-31","","2024-02-29","2023-11-27","2023-11-27","","2023-11-27","2023-11-27","2023-11-27","2023-11-27","2023-11-27","2023-11-29","","2023-09-30","2023-09-30","2023-06-30","2023-09-29","2023-06-30","2023-09-21","2023-06-06","2023-06-16","2023-03-31","2023-03-31","2023-03-02","2022-12-31","2022-09-30","2022-09-30","2022-06-30","2022-06-30","","","","","","","","","","","","","","","","",""],"acceptanceDateTime":["2026-09-30T21:23:20.000Z","2026-09-28T18:45:50.000Z","2026-09-16T10:07:00.000Z","2026-05-12T11:22:47.000Z","2026-02-09T11:12:56.000Z","2025-11-12T13:00:58.000Z","2025-09-26T13:55:04.000Z","2025-05-14T12:00:51.000Z","2025-04-11T10:41:19.000Z","2025-03-10T19:28:06.000Z","2025-02-14T12:13:54.000Z","2025-02-03T21:36:08.000Z","2025-01-31T21:11:00.000Z","2025-01-27T20:21:57.000Z","2025-01-24T22:36:08.000Z","2025-01-15T18:45:43.000Z","2024-12-31T11:31:26.000Z","2024-11-14T12:20:23.000Z","2024-10-15T18:44:08.000Z","2024-10-15T18:43:12.000Z","2024-09-30T12:09:46.000Z","2024-09-30T12:09:00.000Z","2024-08-16T12:00:39.000Z","2024-06-28T14:36:04.000Z","2024-05-31T14:36:06.000Z","2024-05-09T14:49:06.000Z","2024-04-18T17:36:07.000Z","2024-03-27T16:52:56.000Z","2024-02-29T11:08:48.000Z","2024-02-07T19:06:00.000Z","2024-01-12T01:07:03.000Z","2024-01-12T01:04:11.000Z","2023-12-27T17:28:16.000Z","2023-12-14T01:09:16.000Z","2023-12-12T16:42:07.000Z","2023-12-11T20:01:47.000Z","2023-12-11T19:39:32.000Z","2023-12-11T16:10:43.000Z","2023-12-11T16:06:43.000Z","2023-12-11T16:03:16.000Z","2023-12-04T11:36:37.000Z","2023-11-27T11:37:55.000Z","2023-11-20T16:03:33.000Z","2023-11-14T15:51:25.000Z","2023-11-14T15:15:12.000Z","2023-10-05T22:22:40.000Z","2023-09-28T20:44:33.000Z","2023-09-27T10:04:28.000Z","2023-08-22T10:05:37.000Z","2023-06-30T14:03:27.000Z","2023-05-22T10:45:57.000Z","2023-05-15T15:17:28.000Z","2023-03-02T18:22:48.000Z","2023-02-14T11:04:34.000Z","2022-11-30T11:20:26.000Z","2022-11-14T11:14:55.000Z","2022-10-13T11:55:34.000Z","2022-09-28T10:01:23.000Z","2022-08-03T04:15:21.000Z","2022-07-29T16:14:04.000Z","2022-07-29T10:07:21.000Z","2022-07-28T10:02:18.000Z","2022-06-29T17:39:50.000Z","2022-06-29T17:39:27.000Z","2022-06-16T20:30:06.000Z","2022-06-08T13:02:30.000Z","2022-06-08T13:01:08.000Z","2022-05-03T23:30:03.000Z","2022-04-18T12:43:40.000Z","2022-04-18T12:41:48.000Z","2022-02-04T22:30:12.000Z","2022-01-21T11:54:36.000Z","2022-01-21T11:54:20.000Z","2021-12-07T21:30:05.000Z","2021-11-10T15:39:14.000Z"],"act":["34","34","34","34","34","34","34","34","34","34","34","","","","","34","34","34","","34","34","34","34","","","34","","34","34","34","34","34","","","34","","","","","","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","33","","","","","33","","","33","","","33","","","33","","33"],"form":["10-K","NT 10-K","8-K","10-Q","10-Q","10-Q","10-K","10-Q","8-K","8-K","10-Q","UPLOAD","3","CORRESP","UPLOAD","DEF 14A","8-K","10-Q","CORRESP","10-K","NT 10-K","8-K","8-K","UPLOAD","UPLOAD","10-Q","UPLOAD","8-K/A","8-K","10-Q","DEFA14A","DEF 14A","3","3","SC 13D","3","3","3","3","3","8-K","8-A12G","10-Q","NT 10-Q","10-K","8-K","NT 10-K","8-K","8-K","8-K","10-Q","NT 10-Q","8-K","10-Q","10-Q","NT 10-Q","10-K","NT 10-K","EFFECT","CORRESP","CORRESP","CORRESP","CORRESP","S-1/A","UPLOAD","CORRESP","S-1/A","UPLOAD","CORRESP","S-1/A","UPLOAD","CORRESP","S-1/A","UPLOAD","S-1"],"fileNumber":["000-56615","000-56615","000-56615","000-56615","000-56615","000-56615","000-56615","000-56615","000-56615","000-56615","000-56615","000-56615","","","000-56615","000-56615","000-56615","000-56615","","000-56615","000-56615","000-56615","000-56615","333-260951","333-260951","000-56615","333-260951","000-56615","000-56615","000-56615","000-56615","000-56615","","","005-94254","","","","","","000-56615","000-56615","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","333-260951","","","","","333-260951","","","333-260951","","","333-260951","","","333-260951","","333-260951"],"filmNumber":["261428111","261416321","261382319","26965872","26609478","251469050","251345864","25942701","25829810","25723352","25623181","","","","","25532446","241591146","241457172","","241371415","241336739","241336727","241214162","","","24929192","","24788097","24698624","24603709","24530373","24530372","","","231480402","","","","","","231461265","231437277","231421255","231402605","231402399","231312346","231290389","231281738","231190921","231059922","23942370","23919716","23697735","23621748","221434260","221379702","221308113","221272688","221130765","","","","","221053894","","","221002695","","","22831094","","","22544098","","211395177"],"items":["","","5.02","","","","","","8.01,9.01","5.07","","","","","","","5.03,9.01","","","","","5.02","4.01,9.01","","","","","4.01,9.01","5.07","","","","","","","","","","","","5.02,9.01","","","","","4.01,9.01","","5.03,9.01","8.01,9.01","4.01,9.01","","","5.02,9.01","","","","","","S-1,,2022-08-02 11:00:00","","","","","","","","","","","","","","","",""],"core_type":["XBRL","NT 10-K","XBRL","XBRL","XBRL","XBRL","XBRL","XBRL","XBRL","XBRL","XBRL","LETTER","3","CORRESP","LETTER","DEF 14A","XBRL","XBRL","CORRESP","XBRL","NT 10-K","XBRL","XBRL","LETTER","LETTER","XBRL","LETTER","XBRL","XBRL","XBRL","DEFA14A","DEF 14A","3","3","SC 13D","3","3","3","3","3","XBRL","8-A12G","XBRL","NT 10-Q","XBRL","XBRL","NT 10-K","XBRL","XBRL","XBRL","XBRL","NT 10-Q","XBRL","XBRL","XBRL","NT 10-Q","XBRL","NT 10-K","EFFECT","CORRESP","CORRESP","CORRESP","CORRESP","S-1/A","LETTER","CORRESP","S-1/A","LETTER","CORRESP","S-1/A","LETTER","CORRESP","S-1/A","LETTER","S-1"],"size":[5489137,26206,185590,4564725,4424285,4199793,5015437,4448810,215021,199951,4168102,40046,3031,14018,44106,176431,284266,3893567,28984,4927696,26080,196914,205670,41359,41438,4972792,59093,254850,210138,3940252,35475,199596,3055,2978,34379,2930,2930,3529,2979,3592,199676,18806,3709332,25314,4470752,240973,25794,638631,200106,200415,4129083,25363,257071,4059099,3725729,25275,4244296,23139,1765,15998,14517,15341,12813,1272540,44281,23269,1311781,50259,41520,1267747,61872,60448,1533150,68458,3589222],"isXBRL":[1,0,1,1,1,1,1,1,1,1,1,0,0,0,0,0,1,1,0,1,0,1,1,0,0,1,0,1,1,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,1,0,1,1,1,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"isInlineXBRL":[1,0,1,1,1,1,1,1,1,1,1,0,0,0,0,0,1,1,0,1,0,1,1,0,0,1,0,1,1,1,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,1,0,1,1,1,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"isXBRLNumeric":[1,0,0,1,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"primaryDocument":["ea0305976-10k_longduoduo.htm","ea0306900-nt10k_longduo.htm","ea0305656-8k_longdu.htm","ea0289414-10q_longduoduo.htm","ea0274969-10q_longduoduo.htm","ea0263393-10q_longduoduo.htm","ea0258181-10k_longduo.htm","ea0241213-10q_longduo.htm","ea0237938-8k_longdu.htm","ea0233816-8k_longduo.htm","ea0230291-10q_longduo.htm","filename1.pdf","xslF345X02/primary_doc.xml","filename1.htm","filename1.pdf","ea0227755-def14a_longduoduo.htm","ea0226395-8k_longduo.htm","ea0219353-10q_longduo.htm","filename1.htm","ea0216039-10k_longduo.htm","ea0216020-nt10k_longduo.htm","ea0215988-8k_longduo.htm","ea0211619-8k_longduo.htm","filename1.pdf","filename1.pdf","ea0205397-10q_longduo.htm","filename1.pdf","ea0202693-8ka1_long.htm","ea0200930-8k_longduoduo.htm","f10q1223_longduoduo.htm","ea191536-defa14a_longduoduo.htm","ea191535-def14a_longduoduo.htm","xslF345X02/primary_doc.xml","xslF345X02/primary_doc.xml","ea189887-13dliang_longduo.htm","xslF345X02/primary_doc.xml","xslF345X02/primary_doc.xml","xslF345X02/primary_doc.xml","xslF345X02/primary_doc.xml","xslF345X02/primary_doc.xml","ea189445-8k_longduoduo.htm","ea189038-8a12g_longduoduo.htm","f10q0923_longduo.htm","ea188357-nt10q_longduo.htm","f10k2023_longduoduo.htm","ea186358-8k_longduoduo.htm","ea186013-nt10k_longduo.htm","ea185855-8k_longduoduo.htm","ea184025-8k_longduoduo.htm","ea181203-8k_longduoduo.htm","f10q0323_longduo.htm","ea178604-nt10q_longduo.htm","ea174548-8k_longduoduo.htm","f10q1222_longduoduo.htm","f10q0922_longduoduo.htm","ea168477-nt10q_longduo.htm","f10k2022_longduo.htm","ea166432-nt10k_longduo.htm","xslEFFECTX01/primary_doc.xml","filename1.htm","filename1.htm","filename1.htm","filename1.htm","ea162245-s1a4_longduoduo.htm","filename1.pdf","filename1.htm","ea160777-s1a3_longduoduo.htm","filename1.pdf","filename1.htm","ea158451-s1a2_longduoduo.htm","filename1.pdf","filename1.htm","ea154242-s1a1_longduoduo.htm","filename1.pdf","ea150266-s1_longduoduo.htm"],"primaryDocDescription":["ANNUAL REPORT","NOTIFICATION OF LATE FILING","CURRENT REPORT","QUARTERLY REPORT","QUARTERLY REPORT","QUARTERLY REPORT","ANNUAL REPORT","QUARTERLY REPORT","CURRENT REPORT","CURRENT REPORT","QUARTERLY REPORT","","PRIMARY DOCUMENT","","","DEFINITIVE PROXY STATEMENT","CURRENT REPORT","QUARTERLY REPORT","","ANNUAL REPORT","NOTIFICATION OF LATE FILING","CURRENT REPORT","CURRENT REPORT","","","QUARTERLY REPORT","","AMENDMENT NO. 1 TO FORM 8-K","CURRENT REPORT","QUARTERLY REPORT","DEFINITIVE ADDITIONAL MATERIALS","DEFINITIVE PROXY STATEMENT","PRIMARY DOCUMENT","PRIMARY DOCUMENT","SCHEDULE 13D","PRIMARY DOCUMENT","PRIMARY DOCUMENT","PRIMARY DOCUMENT","PRIMARY DOCUMENT","PRIMARY DOCUMENT","CURRENT REPORT","FOR REGISTRATION OF CERTAIN CLASSES","QUARTERLY REPORT","NOTIFICATION OF LATE FILING","ANNUAL REPORT","CURRENT REPORT","NOTIFICATION OF LATE FILING","CURRENT REPORT","CURRENT REPORT","CURRENT REPORT","QUARTERLY REPORT","NOTIFICATION OF LATE FILING","CURRENT REPORT","QUARTERLY REPORT","QUARTERLY REPORT","NOTIFICATION OF LATE FILING","ANNUAL REPORT","NOTIFICATION OF LATE FILING","","","","","","AMENDMENT NO. 4 TO FORM S-1","","","AMENDMENT NO. 3 TO FORM S-1","","","AMENDMENT NO. 2 TO FORM S-1","","","AMENDMENT NO. 1 TO FORM S-1","","REGISTRATION STATEMENT"]},"files":[]}}