In Tam Xa commune, a farmer, Ms. Nguyen Thi Ngoc, has found success growing kumquat trees on 2 acres of land, generating an annual income of at least 500 million VND. This success has inspired 80% of the commune's farmers to convert their land from corn and sweet potatoes to kumquat cultivation, covering 60ha of the commune's 218ha of agricultural land. The kumquats are sold for consumption and also grown for decorative purposes, with potential income reaching up to 1.5 billion VND per hectare. The commune has been recognized as a craft village by the Hanoi People's Committee and is in the process of being recognized as a 'Tam Xa Quartet' collective trademark. The authorities plan to pilot organic kumquat cultivation to produce clean raw materials for food processing and retail, and are working on building a supply chain to connect farmers with supermarkets and retailers in Hanoi and Vietnam.