China's economy is showing signs of picking up, thanks in part to a rebound in shipments to the U.S. "Manufacturing saw the clearest improvement. Retail sales recovered nicely," according to the China Beige Book, an independent survey of Chinese businesses, on Monday. The survey, covering 1,321 businesses from June 1 to 22, pointed to a surge in luxury goods sales, but weaker tourism-related spending. "The second quarter is ending on a more positive note than it began, but this performance will