Sales Tel.: 021-3728-9818/18802187772 President Xu
Technical telephone: 13585745603 President Wang
After-sales telephone: 021-3728-9818/13585745603 President Wang
Tel: 021-3728-9818
mail box: youshengdaLtd@163.com  
Address: No. 118, Lane 2, Shan"an Road, Shanyang Town, Jinshan District, Shanghai