download the latest version subtitle editor from here

after installing it open it

drag or drop the mks file which contains the chi sub

select what u prefer any track for me i’ll choose the 1st one as example then click ok wait until its load

change the ocr method first from binary image to tesseract 3.02

than download the language

select the chines language both simplified or traditional which you prefer it and download it wait until its finish downloading and installing it than click ok

than start ocr

wait until its done and click ok

than save it as subrip

thats it .