I am going to China, Thailand (hopefully!), Vietnam and Cambodia from October 12 to January 3. We will be travelling in those countries extensively, and are on a somewhat tight budget. The less money we spend on travel, the better. We are flying into Hong Kong and will book our domestic inter-city chinese flights there. We are going from Hong Kong to Shanghai to Beijing to Xi'an to Guilin, then back to Hong Kong. We are looking for any tips to get these flights cheap. If anyone knows of a discount travel agent in hong kong, that would be great. Similarly, We are flying into Bangkok from Hong Kong, and will need to book our southest asian flights there. Any tip for that? Thanks Alot!!!