Subject: File No. SR-CHX-2016-20
From: Tracy Xu

September 12, 2017

The company I work for is a large U.S. service provider and we have benefited greatly from the Chinese investments in Chicago and the Midwest area. Casin Group is a highly regarded and credible company from China. By investing on the information infrastructure of Chicago Stock Exchange and bringing more foreign companies to trade on CSE, CSE will get a major technology boost and attract more foreign investors. The business community in the greater Chicago area will all benefit.