- 1955 March 24- "Wu Xing" China's first branded wristwatch, was created.
- 1957 April 23- launched the first series of "Wu Yi" brand watch.
- 1958 The Tianjin Wu Yi Watch Factory was established.
- 1961 produced the chronograph wristwatch prototype for China Air Force.
- 1965 Assumed ownership of watch case manufacturing facilities.
- 1965 September - Produced the first ST4 tuning fork prototype movement.
- 1966 The "Dong Feng" brand was created (the first wristwatch designed and manufactured independently in China).
- 1973 The "Sea-Gull" brand was created (China first wristwatch brand for export).
- 1975 Successfully developed a lady mechanical wristwatch (China' first lady mechanical wristwatch which accord with international standard).
- 1984 Became the first China enterprise which sponsored China sports delegation at 23rd Olympic Games in Los Angeles.
- 1985 Sponsored China's first Antarctic expedition team.
- 1985-1987 Sponsored "Sea-Gull Cup" Women's Volleyball Tournament for 3 years, and titled "Tianjin Sea-Gull Football Team".
- 1986 The ladies mechanical watch won the State Quality Products' Silver Award.
- 1986 Designed ST11 pointer quartz wristwatch.
- 1988 Promoted to the rank of second class of state enterprises.
- 1989
ST11 pointer quartz wristwatch won the gold award from the 62nd international Poznan Fair (the first China-made watch to win an international gold medal)
- 1990 Promoted the rank to first class of state enterprises.
- 1990 Became the Official Watch Sponsor of the 11th Asian Games.
- 1992 Stopped producing mechanical watches, and began to make quantity production of quartz watches.
- 1993 Established Tianjin ISA Company.
- 1994 Sponsored the 43rd World Table Tennis Championships.
- 1995 Formed Tianjin Sea-Gull Watch (Group) Company.
- 2000 Made high-grade gold watches of "Zhong Hua" brand, and the watches were collected by The Museum of Chinese History.
- 2000 Passed city-class enterprise technology center certification.
- 2001 Passed ISO9002 Quality System Certification.
- 2001 Established Dalian Zhongou Company.
- 2002 Established Tianjin Bohai Zhongou Watch Technology Co., Ltd.
- 2002 Became the Official Watch Sponsor of China Football Association in World Cup period.
- 2002 Awarded the title of China Top Brand.
- 2003 Established Shijiazhuang Zhongou Company.
- 2003 Set up Tsinlien Seagull Co., Ltd. And Tsinlien Horologia Co., Ltd. in Hong Kong.
- 2004 Established Tianjin Zhongou Watch Group Co., Ltd.
- 2004 November, Re-developed the chronograph movement.
- 2005 March, Tourbillion wristwatch in rose gold was collected by Tianjin Museum.
- 2005 Identified as China Well-known Trade Mark.
- 2005
Launched the tourbillion wristwatch with power reserve and date display (limited edition of 50 pcs in rose gold), with the No.1 edition presented to Olympic Champion Liu Xiang.
- 2005 Launched the tourbillon skeleton watch with power reserve and date display (limited edition of 100 pcs in rose gold)
- 2005 Launched the skeleton chronograph watch (limited edition of 100 pcs in rose gold)
- 2005 Sea-Gull were making more than 25% of all the world's mechanical movements.
- 2006 Named China Time-honored Brand.
- 2006 June, Launched the tourbillon watch with retrograde date and day ( limited edition of 100 pcs in rose gold)
- 2006 September- Successfully developed double tourbillon wristwatch and displayed for the first time.
- 2006 September 29th "Sea-Gull Watches Culture & Art Salon' was set up.
- 2006 November Launched Marshal Memorial Watch.
- 2006 December Launched the tourbillon watch with power reserve, day & night, and date display (limited edition of 100 pcs in rose gold.
- 2007 Set up Seagull Company in Switzerland.
- 2007 February- Launched the quarter repeater watch (limited edition 10 pcs in platinum, and 40 pcs in rose gold)
- 2007 April, Successfully developed minute repeater watch and displayed in Baselworld for the first time.
- 2007 August, launched the double-tourbillon watch (limited edition of 9pcs in platinum, 90 pcs in rose gold, and 90 pcs of skeleton in rose gold)
- 2007
September, Successfully developed perpetual calendar watch and displayed in Hong Kong Watch & Clock Fair for the first time, "three classic complication watches" all made by Sea-Gull.
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