How can someone get "letter of visitation" from Chinese government, bcus no one is there for him/she

If there is no people or employee offering you invitation letter, I'm afraid you can not get a China visa.

I want a Chinese visa for business purpose, however IV is very important as you right recommend me to get one. Copied, I will see to it, regardless when the Embassy will resume back in Nigeria.
thanks to u Angela, best regard.

.....but could you help me out or should you know anybody who can be of help to me?

This is my very first time wanting to engage in international business trip, and I don't know anybody in China. I deals with "Phone accessories"

I would appreciate it if I find my way through.. thanks.