I work in HK and got HK ID my company has office representative in china, I am a Filipino passport holder and would like to apply a visa from Philippines for business visa as some people said I could get longer limit of stay in China if I apply the visa from home country instead of HK. as a visitor to stay in china is 1 month and If I apply for business visa can I get longer of stay if I apply from Philippines?

What are the requirement I need to provide.

Thank you in Advance for your reply.