About Plsql can't display Chinese correctly

Just download installed plsql Developer, execute SQL query statement, found that the displayed data as long as the Chinese will be? Said. After the online query that this is the client and the server character set mismatch caused. Here's how to fix it:
1. Query the Oracle server-side character set. Open the Plsql Query window and enter the following SQL query statement.
Select Userenv (' language ') from dual;

The resulting server character set is: Simplified Chinese_china. Zhs16gbk
2, My Computer environment variable interface, in the system variable added:
Variable name: Nls_lang
Variable value: Simplified Chinese_china. Zhs16gbk
The value of the variable is consistent with the value queried by the server.

About Plsql can't display Chinese correctly