The information and computing science major of Sun Yat-sen University belongs to the School of Digital and Computing Science, which is a very strong major of Sun Yat-sen University. Employment is relatively easy in the whole country. As a graduate student, it is not a problem to find employment in South China.
As for the admission ratio, it is not fixed every year. In 2009, 43 people applied for the exam, and the admission information has not been published on 10, but it should be easy to get in.