sorry for not typing in Chinese.
Philly has only one China town as far as I know. There is no chinese Buffet in Chinatown. But some good restaurants.
Please check out the following site to see if it helps you.
http://www.pages.drexel.edu/~dsocssa/chinatown.html
Besides, I would also recommend a Korean buffet if you like Korean BBQ:
Philly's Buffet,
Phone: 610-284-9000
7260 Marshall Road Upper Darby PA 19082
$20 per person. Kid under 5 yr eat free
Hopefully it helps you out.