1. The downloaded compressed package file contains the Chinese package WebStorm_zh_CN.rar. After finding it, follow the steps below to Chineseize it
2. Copy the resources_en.jar file in the .\Webstorm\lib directory and change its name to resources_cn.jar.
3. Double-click to open resources_cn.jar (note that it is opened instead of decompressed), drag all the files in the downloaded Chinese package zh_CN directory to the messages directory in the resources_cn.jar file you just opened, and save it.
4. Copy the resources_cn.jar file back to the .\Webstorm\lib directory. Or directly copy the resources_cn.jar in the Chinese package to the .\Webstorm\lib directory.
5. After finishing Chinese, reopen Webstorm to display Chinese.