Dear Waqas,
Thanks for contacting Top China Travel!
I am sorry to tell you that we do not offer visa service, because we are located in Guilin. You may have to apply for the visa by yourself by going to the Chinese Embassy in Pakistan in person. You may read the Chinese Embassy in Pakistan info at /chinese-embassy/china-embassy-and-consulates-in-pakistan.htm
Any further request or question, please feel free to contact with us.