Can South Korea passport holder apply VOA at Shenzhen & where can we apply?

Dear Sir/Madam,

If we bring our client (hold South Korea Passport) to go to Shenzhen for one day trip and they did not apply China visa before. Can he apply VOA in Shenzhen and where can he apply? If it is possible, what is the procedure and documents? Thank you.

Tks & Rgds
Yannis