first time visit to my company in China.

Dear sir,

We do not have any branch in Pakistan.
We purchase the leather from many leather tanneries from pakistan and further process complete in China.

I have my employ letter by my company.
I have invitation letter from my company.
I have my salery bank statement.
I have my TeX number.
I have clear police report by police department.
And I have invitation letter by duly authorize unit from China.

So please guide me...what I need more.
Because I am not employer in Pakistan...I am Pakistan national and paying duty in Pakistan for our company project.

Please guide me.

Thank you.

Tahir Mehmood