TOAD for SAP - Sybase 16 Chinese Character

I am using TOAD for SAP Solution freeware 4.1.0.142 (64 bit) on Windows 10 (1809 64 bit) and connect to Sybase ASE 16.0, the server charset is iso_1. I am trying to use iso_1,big5,utf8,cp950,cp850 ... charsets in connection properties to establish the connection, when issue query sql to server, the return Chinese characters are all unrecognized. Somebody can share the experience for solution?

Hi Andy,
we already have a task open for issues like this one - TMB-1850.