Anhui Wanyi Science and Technology Co,. Ltd.(stock code:688600)is a high-techenterprise focusing on sealing testing. The company independently develops andproduces high-end helium mass spectrometer leak detector, air tightness leak
detector,vacuum chamber helium detection system and helium charging, recovery and purification system, which are widely used in semiconductor, new energy, automobile.medical, refrigeration, electric power, traditional vacuum, electronic appliances, 3C aerospace and other industries.