How will Biden's hi-tech pledges to Hanoi affect China's role in Vietnam and global supply chain?

Washington's latest pledges to hi-tech industries in Vietnam could further move the Southeast Asian nation up the manufacturing value chain, signalling a resolute de-risking from Beijing and subsequently threatening China's industry dominance.

While it is not likely to push China out of supply chains in the short term, many analysts warn that Beijing's tactic of using its Southeast Asian neighbour as a re-export centre may receive further scrutiny.

Vietnam signed billion-dollar deals with American businesses, including Boeing, Microsoft and Nvidia, during US President Joe Biden's two-day state visit to Hanoi on September 10 - when he pledged to deepen cooperation in "cloud computing, semiconductors and artificial intelligence".

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Last week US Commerce Secretary Gina Raimondo further discussed with Vietnamese Prime Minister Pham Minh Chinh how to advance their comprehensive strategic partnership, including US recognition of Vietnam's market economy status.

Alicia Garcia-Herrero, chief Asia-Pacific economist for French investment bank Natixis, said while China was "much more present in Vietnam than the US" in terms of manufacturing companies and investment, the big question was whether Biden's pledges and the US move into hi-tech production would "push China out of Vietnam".

"This is very difficult, I think Vietnam will try to play both games, but I am sure the US is going to ask Vietnam to strengthen its rules of origin, meaning it is not going to be possible any more for Vietnam to export Chinese products as if they were Vietnamese instead of Chinese," she said.

"This is a big minus for Chinese companies operating in Vietnam."

Garcia-Herrero said a major reason for Chinese companies to move to Vietnam would be to avoid tariffs.

Kyle Freeman, a Hanoi-based partner at business advisory firm Dezan Shira & Associates, expects to see some changes in the supply chain.

"I would expect that to continue to shift a little bit. As countries like Vietnam gain more experience in production we should expect them to move up the value chain and also take up a bigger share in the component part as well," he said.

Freeman, who relocated from Beijing last year, said Vietnam was still well positioned to continue to gain a larger market share in these key export industries because of low costs and a young labour force.