Being good has its rewards in Nanjing

Dai Honglin, a taxi driver in Nanjing, Jiangsu province, did not expect to receive an "integrity card" when he first started donating blood.

Over the past decade, he has donated more than 4,000 milliliters of blood and hematopoietic stem cells, which qualifies him to be one of just 18,000 people to be rewarded with the card.

The card gives him a 60 percent discount on bus fare, a 50 percent discount on subway fare and free entry at many museums. It's also good for discounts on medical bills and bank loans.