From November 13 to 15, 2019, the three-day 7th OI CHINA 2019 Shanghai International Marine Technology and Engineering Equipement Exhibition was successfully organized by Reed Expo Group and jointly organized by Ocean Observation Technology Branch of Oceanographic Society of CHINA and Ocean Observation Branch of Chinese Society of Oceanology and Limnology.  According to statistics, this year's OI CHINA attracted nearly 200 exhibitors and 5000+ participants from more than 10 countries and regions including China, the United Kingdom, the United States, Germany, Canada and the Netherlands. Shallow-sea Technology participated in OI CHINA with a number of new Marine monitoring equipment, includingAutomatic Profile Nutrient Analyzer(APNA), Profiling Crawler (Prawler) a new product of McLane Company, and total dissolved inorganic carbon analyzer AS-C6L (with Li 7815), a new product of Apollo Company, etc. In order to enhance the interaction, exchange and cooperation with Marine counterparts, scientific research workers, and the international community. For the support and promotion of the development and growth of our Marine cause contributed bricks and tiles.