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Land Use Rights, Net (Tables)
12 Months Ended
May 31, 2019
Text Block [Abstract]  
Land Use Rights, Net
Land use rights, net, consisted of the following:
 
  As of May 31, 
  2018  2019 
  US$  US$ 
Land use rights
      5,315       7,955 
Less: accumulated amortization
  (1,417  (1,680)
Exchange differences
  (113  130 
  
 
 
  
 
 
 
Land use rights, net
  3,785   6,405