There is no decent Chinese food in Hillcrest. and the one who mentioned Dumpling Inn, that is a crap restaurant in a crap mini mall. I don't understand why it is so busy. Then again, every mall on Convoy or Clairmont Mesa is a crap mini mall, but that's beside the point.
To be truthfull, there are very few decent Chinese restaurants in San Diego. The few that are decent are
Shanghai City - Shanghai
Ba Ren - Sichuan
Dede's Tea House - Sichuan
Golden City - Cantonese
Chinamax - dimsum
Jade - dimsum
Tea Station - Taiwanese cafe
Chin's Seafood Grill - Zheijiang / Jiangsu style (Mirarmar Mesa, ask for the Chinese menu)
Pearl - Dimsum
and basically, all the rest suck.
I've personally been to all of these except for Pearl and Chinamax.
Many of these you will find here on Kirks food blog
http://mmm-yoso.typepad.com/mmmyoso/chinese_restaurants/index.html