Our company Jiaxing JingKong Electronic CO;Ltd(JJK) is a professional manufacturer engaged in producing Quartz monitor crystal and Quartz crystal microbalance from China. JJK has begun to produce substrates of quartz monitor crystal since 2004 and supplied American market on a large scale from the second half of 2005, which makes our company the largest manufacturer of Quartz Crystal in China. At the beginning of 2008, our company introduced from America coating equipment to make finished goods of quartz monitor crystal and began to extend civil market comprehensively. We hold 5Mhz&6Mhz Quartz crystal with three kinds of electrode material- gold , silver and alloy , excellent for optical coating and metallization. Products applied to different vacuum coating machines from America, Japan, Germany, well accepted by the customers from optical vacuum coating, LED field and other optical coating, medical, educational research instruments .The new products-Biosensor(QCM). It has been in biological technology, food industry, clinical testing, pharmaceutical industry, biological medicine, environmental analysis etc gain practical applications