Feb 2(Reuters) - Beijing BDstar Navigation Co Ltd
* Says it will buy 60 percent stake in a Shijiazhuang-based microwave technology firm for 180 million yuan, from its 97.2 percent-owned unit
* Says it will increase stake in the microwave technology firm to 63.95 percent
Source text in Chinese:goo.gl/yqWSEG
Further company coverage: (Beijing Headline News)