HANOI, Jan 28 - The European Union and Vietnam want to boost trade and investment in critical minerals, semiconductors and infrastructure, according to a draft joint statement seen by Reuters that is set to be adopted on Thursday as the two sides upgrade diplomatic relations.

The eight-page document, still subject to change, says the EU will also explore the possible transfer of defence technology to Hanoi, as both sides seek closer cooperation on "trusted" telecom networks - at a time when Chinese companies have won contracts in Vietnam's 5G development.