Quantitative trading firms Susquehanna International Group and XR Trading have provided an undisclosed amount of funding for US-based low-latency network technology provider McKay Brothers. The company’s founders will retain a share of more than 70%, McKay having previously received funding from trading firms IMC and Tower Research Capital.

Medical services provider Shulan Health has led a RMB30m ($4.5m) pre-series A round for Hsmap, the China-based creator of a big data platform for the healthcare industry, 36kr reported today. Hangzhou Wangmei…