I plan to visit Yangtze river of China next year, when is the best time? How can I book Yangtze Cruise?

It was also hard for me to book the Yangtze Cruise while I plan to there last year, I search on the website and noted the average temperature is 30 C(90F) in July and 10 C(50F) in January. In summer, dramatic thunderstorms and heavy rains often happen to make the water level high between July and September, while winter is short and cold. Thus, spring and autumn are the best seasons for taking the cruise. It is so nice and convenient while I find ChinaTravelDepot.com, I booked it on that website and have already finished my trip yet this Spring, I really want to say this trip is wonderful, try this website http://www.chinatraveldepot.com/YangtzeCruise/ , you may gain the Yangtze Cruise you preferred, Good Luck