I already force myself not to go out at night, if I plan on riding the next day. Since it is easy to still blow 0.02 the morning after, like Felix for example has already proved.

I know how it works when your among friends, "ah come on, one more" and then another and another. Then in the end of the night you still drank much more than planned!

Taobao has breathalyzers for like RMB 30 up to RMB 20.000, where does the price meet accuracy?!