How do I set about getting my visas? I have been to China once before.

Nimali, if you have been to PRC before, you should know what documents you need for visiting mainland. Round-trip air tickets and hotel booking are required. Financial proofs are also needed. For visiting HK, you should submit your application to Chinese embassy in your country too. The requirements are almost the same. The only difference is that you fill a different form ID1003A form. And it might take four to six weeks if your application was sent to HK.