Dear Sir, I am the proejct manager for B.O.I approved hotel how can i get a visa to vosit China.

Dear sir,
I am the project manager for Palmyra palm boutique hotel. We are a US$7 million B.O.I project that is ready to be built in Kalkudah. I want to visit Canton fair to find and purchase building material , finishing martial and hotel equipment for our hotel . Please let me know what are there requirements for applying a visit visa.
Kind regards
Ken hetti