在中国，人们有九九重阳节登高的习俗。

People climb up high at every Double Ninth Festival in China.

youdao

古人认为，九九重阳，登高可以避祸免灾。 后来，重阳节登高爬山，逐渐演变成了人们放松心情、锻炼身体的体育和旅游活动。

Ancient people thought climbing a mountain on this day could help them avoid misfortune and prevent disasters, and it gradually evolved into a custom for relaxation, hike and exercise.

youdao