Matrix Partners, a US-based private equity investment firm, and Beite Fund, a buyout fund, led a $137m Series B round in Echint, a company mainly engaged in integrated circuit board level advanced system assembly. "Echint will continue to drive development through innovation, continuously optimize product research and development capabilities, collaborate with upstream and downstream industries in innovation, and help China's semiconductor assembly and testing industry further strengthen international competitiveness," Liangchao Li, Echint President.