Work visa for foreign investor in newly started hi-tech company in China

Hi there, first of all many thanks for having such a great online resource platform in place.
Myself Maho from India. I have made a small investment in recently started hi-tech start up company in China. This company is accredited and backed by local government. Now I need to join the company's office in China and would like to know do I need a work Z for this as an investor? or is there any other type?. Secondly, is there any minimum threshold for the investment to eligible for work Z in the same company where the investment is made?
kindly advise.

Many thanks in advance.