This is completely non-sense and ridiculous, as Chinese citizen, first of all we don’t use email like you do and considering the huge amount of people the method to test the civic honesty is never fair at the first place. Those plastic bags could be easily cleaned by our street cleaner because it doesn’t look like a wallet AT ALL! Secondly we use we chat, the test has never considered China’s local customs, we have lost & found in every police station and we have those police stations every twice a block. People could just put the bag there! And why would any Chinese citizen want to keep a bag with only that much of money? Each country has different type of culture and indeed we are conservatives, a lot of us will not contact the owner if we can just give them to the police station. This test is completely non sense and not realistic.