• Yung Shun was founded by Chang Tu-Chiang and Chang Man-Chao brothers in Homei town ChungHua, as a foundry factory to provide sand casting service on brass and bronze material. The sand casting max. capacity was 70ton/month. 


  • Mr. Chang Man-Chao left Yuan Shun and Yung Chuan was founded by Chang Tu-Chiang to produced PVC brass ball valve serial products.The PVC brass ball valves also acquired new proucts patent with "O.Y." logo in Taiwan. The Yung Chuam started PVC brass ball valves business for Taiwan big wholesaler. 


  • New elbow, coupling, tee, male adapter(Water stop drain-out during faucet renew) acquire patent in Taiwan, Germany and Japan. At the same time,Yuan-Shun's PVC brass ball valve had max. market share in Taiwan. 


  • To extend YO's products line, specialized in thread pipe fittings, cast copper fittings, brass sanitary accessories.


  • To establish domestic sale department to distribute sanitary related products to retailer in Taiwan.


  • To extended production equipments(CNC lathe & tapping machine) and inspection tools to meet mass production orders requirement from oversea clients.


  • To start to joined globle trade show(NHS/ISH/MCE/Big 5/KBIS) in USA, Italy, Germany and Dubai and acquire initail well-known from foreign clients.


  • Accquire ISO-9001:2000 certificate by ANAB. At the same time we successfully exported YO's products to Switzerland, USA and Canada.


  • To accquire Norway, Sweden, Russia, Poland and Lithuania client for water well products.


  • The 2nd factory construction finished that expand production equipment and have more stroe space for sanitary distribution business.


  • To rennew MIS system to enhance information match of sale and inventory.


  • To add CNC lathex2 and CNC machine centerx1 to meet cleints orders demand.