Quantitative trading, or quant trading, is a focus of attention whenever the A-share market experiences volatility and this time is no exception. The Response addresses the fairness of quant trading, its market volume and impact, the trading rules and the regulatory measures. Our ObservationsOn this point, the Response does not deny that quant trading has informational and technological advantages. General ObservationsWe believe this Response represents informal regulatory communication through a specialized committee established under an industry self-regulatory organization. Although it is not a formal regulatory document, it may indicate the regulatory direction of quant trading.