What do you need to prepare for driving in western Sichuan?

Most of the road conditions in western Sichuan (Aba Prefecture and Ganzi Prefecture) are very good, but some places have higher altitudes, so it is generally necessary to pay attention to altitude sickness and take appropriate warm clothes, even in summer. If you drive in western Sichuan in winter, you may encounter icy roads. It is recommended to bring snow chains.