>   In Dec,2006. PVC resin got USA UL certification.

>   In Nov,2006, PVC resin passed ROHS test.

>   In Feb,2006. PVC expanded sheet was developed.

>   In Jun,2005. PPR water supply pipes &fittings was developed.

>   In Jul,2004,To succeed in developing series of fire-stop product, including various of fire-retardant coating &fireproof bushing.

>   In May,2004, Transparent plastic shutters was developed successfully.

>   In 2003. Some of fittings got USA UL product certification.

>   On 18th,Sep, 2003. Build-in plastic assembled case got the certificate of national             compulsory products certification.

>   In Jun,2003, To succeed in developing C-PVC tube for protection of high Tension cable.

>   On 22nd,Apr,2004. To get the right of entry into national power cable.

>   On 15th,Jan,2003, To get ISO9001 Certificate of the system of international quality control certification.

>   In Oct,2002, To become a member of pipeline committee.

>   In May,2002 , Fire-stop device for rigid PE drainpipe was developed.

>   On 31st,Oct,2001. To get the patent certificate of annular encircled plastic pipe with mid level outlet.

>   On 25th,Nov,2001. To get patent certificate of Hollow pipe.

>   On 5th, sep. 2001. To get the patent certificate of silencing plastic drainpipe.

>   In Mar. 2001. Spiral pipe, hollow spiral pipe together with sound-reducing tee was launched for sound deadening of drainage system in high-rise.

>   In Oct. 2000, Be selected as recommend product of national construction.

>   In Sep.2000, Earned a title of outstanding science and technology enterprise in                   Zhejiang province.

>   On Sep.1st, 1999, Liutong Plastic-lined steel multiunit tube, developed by Liutong CO. with the investment amounted to RMB 5 million, has reached national advanced levels.