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Property and Equipment, Net
12 Months Ended
May 31, 2019
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net
8.
PROPERTY AND EQUIPMENT, NET
Property and equipment, net, consisted of the following:
 
  As of May 31, 
  2018  2019 
  US$  US$ 
Buildings
  156,324   142,047 
Transportation equipment
  9,936   9,565 
Furniture and education equipment
  128,670   153,674 
Computer equipment and software
  65,227   70,995 
Leasehold improvements
  349,953   451,105 
  
 
 
  
 
 
 
   710,110   827,386 
Less: accumulated depreciation
  (275,940  (342,106)
Exchange differences
  (15,499  10,359 
Construction in progress
  30,921   36,376 
  
 
 
  
 
 
 
   449,592   532,015 
  
 
 
  
 
 
 
Depreciation expenses for the years ended May 31, 2017, 2018 and 2019 were US$53,864, US$77,081 and US$110,042, respectively.