In 2011, Shandong Rainbow Machinery Co., Ltd. was established, which opened the road of international trade.

In 2012, a professional inspection team and technical team were established, which realized closed-loop management from order acceptance to product delivery

In 2014, Dongying Rainbow Machinery Co., Ltd. was established and the machining equipment was put into operation. The first machining line of the company was put into operation

In 2016, Dongying Giasen Machinery Group Co., Ltd. was established to prepare and put into operation precision casting production line, and the company formally entered the road of Industrial manufacturing

In 2020, the company has invested more than 16 million yuan in the second precision casting automatic production line, transforming and upgrading from traditional casting mode to intelligent manufacturing

In 2022, the company set up a laboratory to support the quality control