I am holding permanent hong kong ID card and UK passport and i want to do business in Shenzhen

I am living in HK over 20 years and my wife is HK chines and i have doughtier too they both holing chines and HK permanent ID card i am holing only HK permanent ID card and UK passport i wanted to start my business in Shenzhen china i wanted to apply business visa what documents i needed for visa and where i should do for visa any advice will be appreciated.thanks in advance.