Progress at Nhổn - Hà Nội railway station metro line. 647 Meters of tunnel excavated at a depth of 17.6 metre by German Tunnel Boring Machine Herrenknecht. Tunneling is achieved by Vietnamese and international engineers.

Vietnamnet give good pictures for tunnel works.

https://vietnamnet.vn/en/647-meters-down-progress-on-hanoi-s-nhon-hanoi-metro-tunnel-2347700.html