You are not getting a wrong amount.Yeah,the most recent promotion from AirAsia is flying to Hangzhou from Kuala Lumpur @ only RM99/way.

For my experience,if we calculated all other charges together with the fair price,that will be around RM400.Still it is an very attractive figure,right?

If your destination is Shanghai,you can take a airport shuttle bus at Hangzhou international airport which is directly provided by AirAsia spending 2 hours to reach there with the cost of CNY100/way.Of course,you can take other airport shuttle buses too.

Have a nice trip!