You must use Far Manager + JD Flasher (free tool).

Use generic versions.

Check here:
Top Sony - Info. Lenguaje

To have Chinese, you can use:

Main China ---> FS APAC or China ---> CDA Generic APAC or China (in this case if you select APAC, use CDA APAC or if you use FS China, use CDA China)

Main Hong Kong ---> FS Hong Kong ---> CDA Hong Kong

Main Taiwan ---> FS Taiwan ---> CDA Taiwan

This depends on the type of Chinese you need.