EDGAR Filing Documents for 0001683168-21-001054

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:

SEC Accession No. 0001683168-21-001054

Filing Date

2021-03-25

Accepted

2021-03-25 16:04:07

Documents

Period of Report

2020-12-31

Document Format Files

Seq	Description	Document	Type	Size
1	FORM 10-K	luduson_10k-123120.htm	10-K	569112
2	DESCRIPTION OF SECURITIES	luduson_ex0406.htm	EX-4.6	13827
3	TENANT LEASE EXTENSION	luduson_ex1002.htm	EX-10.2	3582
4	LIST OF SUBSIDIARIES	luduson_ex21.htm	EX-21	5639
5	CERTIFICATION	luduson_ex3101.htm	EX-31.1	8712
6	CERTIFICATION	luduson_ex3102.htm	EX-31.2	8779
7	CERTIFICATION	luduson_ex3201.htm	EX-32.1	4151
8	CERTIFICATION	luduson_ex3202.htm	EX-32.2	3495
9	GRAPHIC	image_003.jpg	GRAPHIC	64325
10	GRAPHIC	image_009.jpg	GRAPHIC	17162
11	GRAPHIC	image_010.jpg	GRAPHIC	29992
12	GRAPHIC	image_011.jpg	GRAPHIC	27733
13	GRAPHIC	image_012.jpg	GRAPHIC	27186
14	GRAPHIC	image_013.jpg	GRAPHIC	10769
15	GRAPHIC	image_015.jpg	GRAPHIC	27910
16	GRAPHIC	image_016.jpg	GRAPHIC	24750
17	GRAPHIC	image_019.jpg	GRAPHIC	2561
18	GRAPHIC	image_020.jpg	GRAPHIC	6057
19	GRAPHIC	image_021.jpg	GRAPHIC	15509
20	GRAPHIC	image_032.jpg	GRAPHIC	88325
21	GRAPHIC	image_033.jpg	GRAPHIC	76310
22	GRAPHIC	image_034.jpg	GRAPHIC	51314
23	GRAPHIC	image_035.jpg	GRAPHIC	38154
	Complete submission text file	0001683168-21-001054.txt		3376276

Data Files

Seq	Description	Document	Type	Size
24	XBRL INSTANCE FILE	ldsn-20201231.xml	EX-101.INS	393083
25	XBRL SCHEMA FILE	ldsn-20201231.xsd	EX-101.SCH	28802
26	XBRL CALCULATION FILE	ldsn-20201231_cal.xml	EX-101.CAL	44594
27	XBRL DEFINITION FILE	ldsn-20201231_def.xml	EX-101.DEF	76454
28	XBRL LABEL FILE	ldsn-20201231_lab.xml	EX-101.LAB	188435
29	XBRL PRESENTATION FILE	ldsn-20201231_pre.xml	EX-101.PRE	165606

Mailing Address 17/F, 80 GLOUCESTER ROAD WANCHAI K3 00000

Business Address 17/F, 80 GLOUCESTER ROAD WANCHAI K3 00000 852-2818-7199