German apply China Bussiness visa

Dear Sir/Madam,

I am Annie and I am looking for how to apply for a visa to enter China for my boyfriend. For the current situation, I understand that it is difficult to apply for a visa. But can I know how to apply for a business visa? He is from Germany, holds a German passport, works/lives in Singapore, and holds a work visa in Singapore. He will enter China from Singapore.

Looking forward hearing from you soon

Thank you
Annie Lin