Read on Twitter
China built a wall along Vietnam border? I cycled more than 100km along border this time last year and didn’t see any sign of barriers. https://mobile.abc.net.au/news/2021-01-25/why-china-building-border-walls-with-vietnam-myanmar/13068344
At the China-Vietnam border town of Hekou the international border is nothing more than a trickle of water. This is taken from a bar on the 
side looking into Lao Cai in 
side looking into Lao Cai in
View of Vietnam from my China hotel window in Hekou, Jan 2020
from my China hotel window in Hekou, Jan 2020
This is what the China-Vietnam border looks like for the 100+km stretch along the Red River. No wall. Lots of smuggling/illicit crossings according to the locals
Contrary to the ABC article I didn’t notice any Chinese on Vietnam side of border but there are literally thousands of poor Vietnamese in Hekou doing small scale trade and business. The standard of living difference is large. This woman came over for the day just to sell Bahn Mi
The China-Vietnam border wends through 100s of km of remote jungle hills like these. I very much doubt China would be building a fence or wall the whole length
Don’t know about a wall but I can tell you what China IS building along the Vietnam border - a massive expressway that will cut the journey time between Kunming and Hanoi to just a few hours rather than several days. Literally Belt and Road Initiative #bri
Another aspect of the Belt and Road is the new high speed train from China to Vietnam border. Journey time reduced to 4 hours from 15 (overnight). It replaces the old narrow gauge Hanoi to Kunming railway built by the French
Vietnamese media story about the porous border - these Vietnamese illegal migrants were caught sneaking back into the country via mountain trails at Ha Giang, near Hejou/Lao Cai
