2011: Rainbow with 3500 m²  was found in Suzhou China.

2012: setup injection department and provide injection parts & service for customer.

2013: entered Ford supply chain; entered VarrocTYC and Marelli supply chain.

2014: annual turnover exceeded €3.85 million (¥30 million).

2015: entered GAC FCA supply chain; imported 4 sets QuickJet high-speed CNC machines; annual turnover exceeded €6.42 million (¥50 million).

2016: entered Hella supply chain; imported 4 sets dual-heads EDM machines.

2017: entered Valeo supply chain; imported 4 sets injection machines; annual turnover exceeded €10.28 million (¥80 million).

2018: entered BWM supply chain; entered VW supply chain; annual turnover exceeded €11.56 million(¥90 million).

2019: passed IATF 16949; Predicted annual turnover is €12.2 million(¥95 million).