In December 2004, Jiangsu PG Slot Crane Machinery Co., Ltd. was established.

The factory was officially put into operation in June 2005 and achieved a sales revenue of 30 million yuan in the first year.

Obtained the manufacturing license for 100t bridge and gantry crane in 2006.

Obtained the manufacturing license for 200t bridge and gantry crane in 2007.

In 2008, Jiangsu PG Slot Crane Machinery Co., Ltd. achieved annual sales of 300 million yuan; Obtain ISO quality management system certificate.

Obtained the manufacturing license for 300T shipbuilding gantry crane in 2009.

Obtained licenses for 26+26t double car electromagnetic bridge crane and 75+75t four beam bridge crane in 2010.

In 2011, the subsidiary Jiangsu PG Slot Heavy Industry Technology Development Co., Ltd. was established.

In 2012, the subsidiary Jiangsu Bull Crane Equipment Co., Ltd. was established.

In 2013, the Jiangsu PG Slot large-scale CNC machining center was completed and put into operation.

In 2014, it was recognized as a national high-tech enterprise and obtained the license for 8080 gantry crane.

In 2015, it was recognized as a private technology enterprise in Jiangsu Province and obtained a license for 800t shipbuilding gantry crane.

Obtained international environmental system certification and occupational health and safety certification in 2016; The 1000T gantry crane and 900T gantry crane have passed the type tests organized by Jiangsu Special Inspection Institute and Liaoning Acad

The construction of Jiangsu PG Slot Heavy Industry Terminal was completed in 2017; The 2000T bridge erecting machine has obtained a type test certificate.

2018 1800T beam type test; The port issues a port operation license and officially operates externally.

In 2019, it was rated as a second level enterprise in safety production standardization; Professional contracting qualification for construction enterprises. In September of the same year, the 1800 ton gantry crane jointly developed by PG Slot Crane Machine

In 2020, the occupational health and safety certification system was upgraded to ISO45001, and the enterprise qualification was added to the construction general contracting.

Outstanding Private Enterprise of Nantong City in 2021 The intelligent building assembly robot made its debut on CCTV's "News Broadcast".

In 2022, the subsidiary Dongsha Shipping (Jiangsu) Co., Ltd. was established. Currently, there are two 10000 ton ocean freight ships, Dongsha 16 and Dongsha 26.

In 2023, the company was recognized as a specialized, refined, distinctive and innovative small and medium-sized enterprise in Jiangsu Province.

In 2024, the company was granted licenses for an 800-ton fixed rotary crane and a 25-ton rail-mounted container gantry crane.