I grew up in the boom of New York's Long Island during the 1960s. I moved to the Houston boom of the 1970s, joined the PC boom of the 1980s, covered the Internet boom of the 1990s, and watched the housing bubble of this decade.
I know what booms look like.
Chengdu is a boom town. (To the right, an image of Brazilian soccer star Kaka hawking Chinese-made throat lozenges in Chengdu's Airport.)