Anyone know good website to book airticket back to CHINA???

Anyone know good website to book airticket back to CHINA???I need to get some cheap airticket to go back to China. But I dont know which website is good/ I tried travelocity.com and some website like it but sounds the price is high, do I have to book ticket from Travel Agency or what should i do? can somebody give me some info on this. thank you in advance