SHANGHAI, China, Jan. 9, 2013 (GLOBE NEWSWIRE) -- JA Solar Holdings Co., Ltd. (Nasdaq:JASO), ("JA Solar" or the "Company"), one of the world's largest manufacturers of high-performance solar power products, today announced that it has commenced mass production of its 5-inch high-efficiency monocrystalline modules. The 72-cell modules produce a maxi...