The Lao Cai 🇻🇳 - Hekou 🇨🇳 route uses locomotives D10H 006 or 011 on the Vietnamese side 🇻🇳, the Son Yeu - Kunming route uses DFH21 locomotives domestically in China 🇨🇳
In Vietnam 🇻🇳, the D10H locomotive runs the Hanoi - Lao Cai route, pulls the passenger train YB1/2 and YB3/4 Hanoi - Yen Bai, and pulls the Lao Cai freight train
There is a cast option when you slide down your finger on the top of screen,make sure your Xiaomi 14 and the TV had connected one same WIFI,then it should be able to cast(actually I did not used this fiction either).
Vietnam is planning to build a new 1435mm route from Laocai station to Hekou North station, which make the goods pass from 1000mm to 1435mm train in Laocai