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INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Cash flows from operating activities:    
Net (loss) income $ (222,643) $ 246,088
Adjustments to reconcile net (loss) income to net cash used in operating activities:    
Depreciation expenses 3,603 24,338
Amortization 0 53,156
Deferred income tax 2,303 (44,703)
Share-based compensation 206,476 58,722
Changes in operating assets and liabilities:    
Accounts receivable, net (443,382) (105,691)
Inventories (166,457) (105,773)
Advance to suppliers (191,417) (3,155)
Prepaid expenses and other assets, net (20,448) (125,612)
Operating lease right-of-use asset 0 25,007
Retention receivables 222,676 0
Accounts payable (132) 21,579
Notes payable 43,985 0
Advance from customers 0 221,902
Advance receipts 481,208 0
Other payables and accrued liabilities 245,955 8,417
Income tax payable 24,251 4,990
Deferred revenue 0 (618,971)
Operating lease liability 0 (8,406)
Amount due from a related party (284,086) 0
Net cash used in operating activities (98,108) (348,112)
Cash flows from investing activities:    
Cash paid for purchase of property (25,068) 0
Cash paid for intangible assets 0 (1,851)
Net cash used in investing activities (25,068) (1,851)
Cash flows from financing activities:    
Bank borrowing (271,432) (15,225)
Proceeds from related parties 0 689,441
Repayment to related parties 0 (22,766)
Proceeds from issuance of common stock 0 828
Net cash (used in) provided by financing activities (271,432) 652,278
Effect of exchange rate changes on cash and cash equivalents 18,155 13,927
Net (decrease) increase in cash and cash equivalents (376,453) 316,242
Cash and cash equivalents at beginning of year 1,023,531 28,539
Cash and cash equivalents at end of year 647,078 344,781
Supplemental disclosures of cash flow information    
Cash paid for interest expenses 0 0
Cash paid for Income taxes $ 0 $ 0