Subscribed chemical equipment maintenance service contract with Rhodia (Zheng Jiang) Chemical Ltd.

Conducted overhaul of chemical facility for Daikin (Changshu) Fluoro Chemical Ltd. in May. YHEEC
is responsible for machinery equipment, control valve and other instrumentation overhaul. Subscribed chemical
facility maintenance contract with Daikin in September.

Conducted hoisting machinery maintenance for Arkema (Changshu) Fluoro Chemical Ltd. in october.

Conducted overhaul and piping construction of two polyester facilities product line for Su Zhou Heng Li
(Sheng Ze) Co., Ltd in November.

2006

Subscribed power facility maintenance service contract with Singpu (Tai Xing) Chemical Ltd.. YHEEC
was responsible for regular inspection and repair of its thermal power sets, also conducted its VCM chemical
facility piping construction in November.

2005

Conducted a part of electrical and instrument installation job for BASF - YPC

Conducted facility repair as well as mechanical, electrical and instrumentation installation for Tianjin
Petrochemical Co., Ltd.

Conducted equipment maintenance, regular inspection and repair, installation and reconstruction of all
product line for Yizheng Polyester Film Company.