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5. FINANCE LEASE RIGHT-OF-USE ASSETS (Details) - USD ($)
Mar. 31, 2019
Dec. 31, 2018
At cost: $ 2,357,888 $ 2,313,274
Less: accumulated depreciation and amortization (2,167,760) (2,062,517)
Net book value 190,128 250,757
Building [Member]    
At cost: 122,211 119,899
Plant and machinery    
At cost: $ 2,235,677 $ 2,193,375