China is set to introduce a law that will force these sort of games to reveal their drop rates. It will be interesting to see if it will have any effect but my gut is telling their wont be any significant changes.

Thinking about it I wonder how they expect games to report this information when it is most likely have 2 or 3 different data sets in the wild with different drop rates. A company could mis-lead customers by displaying the percentages for one data set with favourable odds when in reality they are in a bucket with much worse odds.

Source : http://www.gamesindustry.biz/articles/2016-12-09-china-force...