National Immigration Administration

https://s.nia.gov.cn/mps/main-en.html

Shenzhen Municipal Public Security Bureau

http://ga.sz.gov.cn/

https://msjw.ga.sz.gov.cn/  (click "出入境业务" and then roll down to find "外国人业务Foreigner")

Shenzhen Foreigner Integrated Service Management Platform

https://wgfw.ga.sz.gov.cn/

Shenzhen Municipal Science, Technology and Innovation Bureau (Bureau of Foreign Experts Affairs in Shenzhen)

https://stic.sz.gov.cn/xxgk/ztzl/wzyw/

Shenzhen Tax Service, State Taxation Administration

https://shenzhen.chinatax.gov.cn/sztax/nsfw/nszx/12366dyzly/szswt_en.shtml