The article highlights the significant fluctuation in the price of Japanese purple sweet potatoes for export, which fell to around 50,000 VND/quintal in late May 2021, causing substantial losses for farmers in Vinh Long and Dong Thap provinces in the Mekong Delta. This price drop was attributed to the challenging export situation, especially in the Chinese market. However, prices recovered to around 200,000 VND/quintal after farmers received support and purchases for consumption, only to fall again to about 100,000 VND/quintal. The article emphasizes the need for a traceability certificate to ensure a stable market and fair prices for farmers, who face challenges in cultivation and export. Authorities in Dong Thap Province are taking steps to support sweet potato farmers by enhancing market connections and finding consumption outlets.