Nhon - Ha Noi metro contractor is not Chinese company. It's Hyundai (South Korea) - Ghella (Italy).

Also

ODA loan project from Asian Development Bank (ADB), French Development Agency (AFD), European Investment Bank (EIB) and French Government (DGT). Total estimated investment capital is up to 1.2 billion USD. After that, the project continued to increase capital by nearly 400 million Euros. (google translate)

https://vi.wikipedia.org/wiki/Tuy%E1%BA%BFn_s%E1%BB%91_3_(%C4%90%C6%B0%E1%BB%9Dng_s%E1%BA%AFt_%C4%91%C3%B4_th%E1%BB%8B_H%C3%A0_N%E1%BB%99i)

The one from China is Cat Linh - Ha Dong metro and it's the only one metro among below completed and operational since 2021.