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! 
Wow, this is very cheap as compare to previous price rate… I guess you will find this very useful since you came from China, right? Which state are you from?
Well,Shanghai is my homecity.I think later I can take this flight to go back home.
Oh, Shanghai is your homecity, next time you can be the tour guide if your friends want to go there for a trip…
I had acted as a tour guide once.Of course,any of my friends wanna make one more trip there,I will always be most welcome.
Yeah I know, =p. Well, I hope I can go to China for once in my life, to visit the historical places and enjoy the local cuisines there…
I believe you can do it and you will have a unforgettable trip too.
Yeah, I will be happy to "accomplish" the dream and of course, will be glad to have you as tour guide as well (if can) =p.
Wow,maybe you will prefer a much professional tour guide.haha…
Nah, I dont want to spend much on tour there… I like to travel in backpackers style…
Hehe…I like to do all paperwork before the trip.But I can't 100% follow some westerners to be that backpacker style.Too tacky!
Same goes to me as well, I will check and research everything before I go…
Well,you have a good habit too.
Haha, I have started on my researches of delicious food in KL, as I might come to KL next month…
Hehe,I'm sure you will have a nice trip then.