How many times can Wenzhou donate blood for free by bus?

Over 20 times. Winners of the National Donation Award (who need to donate 4,000ml of blood in Zhejiang Province) can visit the parks and scenic spots sponsored by the government for free with the Certificate of Honorary Blood Donation in Zhejiang Province, go to non-profit medical institutions for free outpatient consultation and take public transportation in the city for free. Award-winning criteria for blood donation award: bronze award: silver award for blood donors who have donated blood for more than 20 times; Gold medal for blood donors who donate blood for more than 30 times: voluntary.