Today, most Chinese are educated, but the tradition  keeps alive in China.

句子中的“keeps alive相当于stays unchanged=remains unchanged”

keep  为持续性系动词 (使)保持，(使)处于（英文解释：to stay in a particular state, condition, or position, or to make someone or something do this

keep为持续性系动词，用来描述主语继续保持某种状态

主语+keep+形容词（alive ,warm,safe,dry,calm,awake,sane,healthy,fit)

In those days they could hardly keep alive.  

那时候,他们简直没法活下去.

We huddled around the fire to keep warm. 

我们挤在火堆边取暖。

I was struggling to keep awake. 

我努力不让自己睡着。

You must look after yourself and keep healthy.  

你一定要照顾好自己,保持健康.