Hanoimilk and BEL Viet Nam are the two companies allowed to export dairy products to China.
The Asia-Africa Market Department (Ministry of Industry and Trade) has just stated that on June 22, 2020, the General Department of China Customs announced the granting of transaction codes for the two Vietnamese companies exported milk products to the Chinese market.

Accordingly, Hanoimilk Joint Stock Company is allowed to export Fermented Milk and Flavoured Fermented Milk to the Chinese market.
BEL Viet Nam Company Limited is allowed to export other cheese to the Chinese market.
The General Department of China Customs also said that this agency is evaluating and assessing the file of granting the transaction codes for NutiFood Company. As soon as the result is available, it will notify Viet Nam.

Thus, up to now, China has granted the transaction codes to a total of 4 Vietnamese companies/factories that are allowed milk products to the Chinese market.
Specifically, sterilized milk and modified milk of TH True Milk; condensed milk of Vinamilk, fermented milk of Hanoimilk and other cheese of BEL Viet Nam.