tourist visa for Pakistani national working in saudi arabia

It is possible to get a China tourist visa in a third country. But I cannot guarantee. You need to submit the following documents to apply for China tourist visa in Saudi Arabia: your passport, one recent passport photo, visa application form V2011A and V2011B, your Saudi Arabia resident visa, probably hotel reservation and round-trip air ticket.

MR . DAVID

THANKS FOR YOUR DETAILED ANSWER , WELL THE QUESTION IS THAT CAN I GET TOURIST VISA FORM SAUDI ARABIA,AS I AM PAKISTAN NATIONAL WORKING HERE .WAT KIND OF DOCUMENT REQUIRED OR CAN I GET TOURIST VISA ON ANY COMPANY INVITATION LETTER.OR I JUST APPLY FOR BUSINESS VISA WITH INVITATION LETTER FORM GOVERNMENT. NEED UR GUIDANCE ON THIS MATTER WILL BE APPRECIATED. THANKS

Nobody except the consular officers can tell if you'll get the visa or not definitely. But if you have long-term Saudi Arabia residence permit, there is a great chance for you to get the tourist visa successfully.
If you are going to apply for the tourist visa, no invitation letter from China side is required. But you need to submit a letter from your employer.
If you are going to apply for a business visa, you need to submit the invitation letter from China government and the letter from your employer. FYI: http://www.chinaembassy.org.sa/eng/nov/t663015.htm