A Malaysian citizen with PR status in Australia, accompanying sister to visit CHina for 15 days

I an taking my sister for a trip to China (visiting Beijing, Xian, Shangai as tourist for 15 days April 2017 We will be flying to Beijing from Kuala Lumpur for the purpose of the trip. What do we need to do in term of visa requirement for the trip. How long should we expect to wait for approval of our application and please tell u the cost of this application. Thank You
JulieK