China visa to visit companies for rate and checking of products

Dear, you can apply for a business visa at the China Visa Center in Pakistan. The required documents include:
(1) Passport
(2) Visa Application Form and Photo
(3) Verification Letter of Invitation or an Invitation Letter (TE) (both of the letters must be extended by a Chinese inviter)
(4) Documents on the commercial activity issued by a trade partner in China, or trade fair invitation or other invitation letters issued by relevant entity or individual.
(5) A supporting letter from the organization which the applicant serves in.
(6) The applicant's tax payment certificate (photocopy, the last three years).
(7) Registration from or Chambership certificate of the company which the applicant serves in (photocopy).
(8) Bank statement (personal or company, the last six months)
(9) A local police character/clearance certificate attested by the Ministry of Foreign Affairs of Pakistan for first time visit to China within the last five years
(10) Round-trip air tickets and hotel booking (first time visit to China)
(11) An applicant may be required to submit an original invitation, provide other supporting documents, or schedule an interview with the consular officer.