Sorry, you can't directly recommend a car rental master in Kashgar or a friend who provides carpooling. However, you can search for relevant information on local travel forums or social media, and you can also consult local travel agencies or hotels for information on car rental masters or carpooling recommended by them.

In addition, you can also try to find carpooling friends in local carpooling or travel groups, or look for tourists who are also going to Kashgar on local travel websites and contact them to discuss whether they can carpool together.

I hope this information can help you. I wish you a pleasant journey in Kashgar!