This is the 3533rd most frequent Chinese word.
此类
"此类" means "this type" or "such kind."
此类 is used here as a determiner to specify 'this type of' issues.
此类问题我们需要先讨论清楚。
We need to discuss such issues clearly beforehand.
此类 emphasizes products belonging to the specified category.
此类产品在市场上非常受欢迎。
This type of product is very popular in the market.
此类 points out specific kinds of incidents to focus on for prevention.