Local officials recently lowered the deposit for a public bike card to 400 yuan per person. 
 
A bike card can be obtained by presenting a personal identity card, either military credential, mainland pass for greater China residents, or passport for expats. Cardholders who paid the original 1,200-yuan deposit can receive a refund at the four branch offices of the bike rental management company.
 
Source:http://www.xmenglish.cn/DynamicInformation/201702/t20170220_5046058.htm