JA Solar Holdings Co (NASDAQ: JASO), a Shanghai-based high-performance solar cell maker, has won a ¥30 billion credit package from China Development Bank to back its business expansion. The company became the world's sixth largest after rolling out 509MW of products last year. Its output is expected to reach 1.8GW this year. JA Solar shares closed at a 52-week high of $7.49 last Friday. China Development Bank has offered loans to a bunch of solar cell producers since April, including a ¥50 billion package to industry leader Suntech Power Holdings Co (NYSE: STP), a ¥30 billion package to Trina Solar Ltd (NYSE: TSL) and a ¥36 billion package to Yingli Green Energy Holdings Co (NYSE: YGE).