Can I go to road trip, Tibet, Xinjiang with a Swiss army knife?

Of course. You need to bring your ID card (border card, passport), driver's license, driving license, cash, bank card, personal card package, paper, wet wipes, garbage bag, Swiss army knife, rope, whistle, toiletries (quick-drying towel, toothbrush, toothpaste, facial cleanser, shampoo, bath towel), down jacket and coat to eat.