For a second degree, I think you will just need to follow the same application procedure as for a normal undergraduate degree. Once you're enrolled in CS, you can vist the academic advisor in your department (CS) and give her the course description of your previous courses in EE from China. She will decide how many credits you can transfer from the previous degree. Though for a change in field, only a few first year credits are transferable as all the first year classes in the faculty of engineering are pretty similiar.