? Ninghai Internal Combustion Engine Filter Factory is established in 1994
? Ningbo Xuyou Communications Electrical Appliance Co.,Ltd is established in 1998
? Xuyou Mold Factory is established in 2003
? Xuyou Pressure-Containing Parts established in 2012
? Ningbo Xuyou Filter Factory is completed in 2014
? Ningbo Xuyou Filter Factory went into operation in 2016