Job requirements for typing Chinese
Here are some things that I found:

http://www.bjshy.gov.cn/Item/64056.aspx:
Beijing Shunyi district in a job related to labor disputes: > 70 WPM.

http://ghj.fuzhou.gov.cn/ghjzwgk/rsxx/201504/t20150414_890668.htm
Fuzhou city/countryside planning: ~60 WPM

http://www.mohrss.gov.cn/SYrlzyhshbzb/fwyd/sykaoshi/zyhgjjgsydwgkzp/201401/W020140124568664734613.doc.
Ministry of Human Resources and Social Security: > 90 WPM for Chinese, > 220 Letters/min for English

http://www.gzjd.gov.cn/jdwsjb/xxgk_phoneweb/xxgkml_phoneweb/tzgg_phoneweb/qt_tzgg_phoneweb/20141104/detail-273178.shtml
Guangzhou Liwan District Public Security Bureau:>50WPM

It seems in general 50 WPM is kinda the minimum. And most places want more. I didn't find any info about certification.