Dong Si signed an agreement to acquire a 2% stake in Dongguan Mentech Optical & Magnetic Co., Ltd. from Yang Xianjin for CNY 38.8 million.

Dongguan Mentech Optical & Magnetic Co., Ltd. is a China-based company principally engaged in the research, development, manufacture and sales of communication magnetic components and communication optoelectronic components in the field of telecommunication. The Company is also engaged in the research, development, manufacture and sales of communication optoelectronic system equipment and adapter terminals. The Company's products are mainly applied in various types of communications equipment. The Company distributes its products in domestic market and to overseas markets.