Quang Ninh province in Vietnam is known for its agricultural products, particularly the quality of its vannamei shrimp and Dong Rui sea duck eggs. The area's high salinity water and mineral-rich sources from limestone mountains make it ideal for shrimp farming, resulting in a dark blue shell and a more delicious meat. The sea duck eggs are large and fragrant due to the ducks being grazed in the coastal alluvium. Quang Ninh has also recognized several other products as typical agricultural products of the province in 2021, including Mong Cai fish sauce, Dam Ha chicken breed, and Co To leaf squid. These products have been granted OCOP product certificates, with the Farmers' Association of Quang Ninh province recognizing 27 products in total.