Before you install, Greasy Fork would like you to know that this script contains antifeatures, which are things there for the script author's benefit, rather than yours.
This script is only fully functional after you make a payment. Greasy Fork is not involved in the payment, so can't validate you will get anything of value or help you get a refund.
The author of this script explains:
脚本题目搜索，需对接第三方接口付费
This script will inject ads on the sites you visit.
The author of this script explains:
脚本搜索题目时，可能附带广告
