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ACCUMULATED LOSSES
12 Months Ended
Jun. 30, 2018
ACCUMULATED LOSSES [Abstract]  
ACCUMULATED LOSSES
12.
ACCUMULATED LOSSES

  
2018
  
2017
 
  
US$
  
US$
 
Balance at July 1
  
(26,424,325
)
  
(23,784,897
)
Net loss for the year
  
(9,957,817
)
  
(2,639,428
)
Balance at June 30
  
(36,382,142
)
  
(26,424,325
)