To improve the efficiency of air conditioning and refrigeration (AC&R) systems, performance improvement of control valves is indispensable. Therefore, control valves are developing in the direction of higher precision, stability, intelligence, and correlation. At China Refrigeration Expo 2021 (CR 2021), many types of valves mainly including electronic expansion valves, four-way valves, ball valves, smart valves, and dampers were exhibited. The valves tend to be specific, refined, and intelligent, and will significantly improve the performance of AC&R systems.