zhejiang sanhua intelligent controls co ltd. (sz002050) is engaged in the research and production of control components, sub-system and technological solutions applied in hvac&r and home appliance. it is the world’s largest supplier of commercial and residential air conditioning, commercial and industrial refrigeration, and home appliances (washing machine, clothes dryer, all-in-one washer dryer, refrigerator, freezer, dishwasher, and coffeemaker). its main products like four-way reversing valve, electronic expansion valve, solenoid valve, step valve and micro-channel heat exchanger take the biggest share of the market all over the world. the clients are listed in fortune global 500 and china's fortune global 500 companies. it works closely with the customers from early r&d to massive production. it is industry-leading, dedicated to provide customers with updated, energy-saving, and intelligent systematic solutions. it has over 10 sales companies in china, north america, europe, japan, korea, and southeast asia. in china and foreign countries, it has seven production bases, located in xinchang, hangzhou, and wuhu, china, and vietnam, the usa, mexico, and poland. it also has three r&d centers which are located in xinchang and hangzhou, china, and austria.