The bank said the circulation of its dual-currency credit card reached 10 million by the end of 2006, a jump of 100 percent from 2005, and accounted for 35 percent of the credit card market in China.

Dual string provides a new fluid circulation way and accelerates the velocity of liquid quickly, improving the efficiency.

The water resources system of basin is the complex system of human and natural water circulation, and dual complex character becomes the intrinsic property of water circulation.