1989 introduced the home appliance protector, the first electronic product developed by Laoying after its establishment.

1990 developed DB 120 atmospheric sampling pump and cyclone inhalable dust sampling head, which should have formally entered the field of environmental protection instruments.

199 1 The first scientific research and production building in Laoying was completed. At the same time, Song Jian, former State Councilor and director of the State Science and Technology Commission, personally wrote the name for the enterprise.

1992 has developed and applied 20 10 timer, which is mainly used for time control on water pump.

1994, Laoying successfully developed the first smoke and dust product.

1995 became a member of China metrology association.

1998 became the first unit in Qingdao to recommend the priority use of environmental protection products.

In 2000, it passed the ISO900 1 quality system certification.

200 1 was rated as a high-tech enterprise in Qingdao.

In 2002, the automatic testing instrument for smoke and dust gas won the "Ninth Five-Year Plan" outstanding project award of enterprise technology innovation in Qingdao.

In 2003, it was recognized as an "annual inspection-free enterprise" by Qingdao Administration for Industry and Commerce.

In 2004, "Laoying" trademark was recognized as a famous trademark in Qingdao and a famous trademark in Shandong Province.

In 2006, it obtained the confirmation certificate of measurement assurance in Shandong Province.

In 2008, it was rated as a national high-tech enterprise.

In 2009, it was rated as AAA-level standard good behavior enterprise.

20 10, Laoying organized the establishment of Qingdao Environmental Monitoring Instrument Standard Alliance.

20 1 1 became the executive director of Shandong Environmental Protection Industry Association.

20 13 "laoying photoelectric environmental protection industrial park" was put into use.

Become a member of Chinese Society of Environmental Sciences.