Hungary is the first EU member state to ratify the Investment Protection Agreement between the European Union and its Member States and the Socialist Republic of Vietnam (/asset/view/119905/Agreement - Consilium.pdf).

Information about the agreement is avaible here:

https://www.consilium.europa.eu/en/press/press-releases/2019/06/25/eu-vietnam-council-adopts-decisions-to-sign-trade-and-investment-agreements/