Myanmar rice exports to China via Muse have fallen due to confiscations by the Chinese authorities.
Trucks bring at least 1,400 tonnes of rice to Muse every day.
Myanmar urged China to buy at least one million tonnes of rice last year and three Chinese companies have agreed to buy 280,000 tonnes of rice, according to the Myanmar Rice Federation.
Rice exporters need a licence from the China Certification and Inspection Group which monitors the goods. The group is planning to open an office in Yangon this month.