In fact, there is not much difference in scenery and experience between the forward and reverse routes on the 318 Sichuan-Tibet Line self-driving tour from Chengdu to Lhasa. The forward route is the process of gradually adapting to the high altitude, while the reverse route is the process of gradually lowering the high altitude. Therefore, the forward route may give the body more time to adapt to the high-altitude environment, but the journey will be tighter; the reverse route may allow the body to adapt to the high-altitude environment more easily, but the journey will be tighter.
Regarding the physical condition of your family members, it is recommended to conduct a comprehensive physical examination before departure to ensure that you are in good health. In addition, you can pay attention to the following points during the trip to reduce the occurrence of high reflex:
Gradually adapt to the high-altitude environment: During the trip, you can gradually increase the altitude to give your body more time to adapt to the high-altitude environment.
Pay attention to rest and diet: During the trip, pay attention to rest and diet, and maintain adequate sleep and nutritional intake to improve the body’s resistance.
Avoid strenuous exercise: In high-altitude environments, avoid strenuous exercise to avoid increasing the burden on the body.
Keep warm: In a high-altitude environment, the temperature is low, so keep warm to avoid catching a cold.

In short, no matter whether you choose the forward or reverse route, you must pay attention to your family’s physical condition and make adequate preparations and response measures. At the same time, it is recommended to consult a doctor before departure to ensure a safe and smooth trip.  

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