How much is it to donate blood for free by bus in Jinan?

400 ml. Free public transport such as buses, river-crossing ferries and urban rail transit is available for the routes in Jinan, and you need to donate 400 ml of blood to ride for free. Jinan, also known as Quancheng, is a prefecture-level city, provincial capital, sub-provincial city, megacity and the core city of Jinan metropolitan area under the jurisdiction of Shandong Province.