Following Big brother (China) policy - that's all . Just doing their job.
VN is practically a China puppet and returning to its original vassal state after all these wars with the French and the US to "gain" its independence. Millions of lives were lost for nothing. The border (with China) is quietly being redrawn; the coastline owned by the Chinese Navy - who sets up oil rigs wherever they please.
All this, and if you live inside the country and lift a finger, you will be persecuted. Now we clearly see what legacy this Ho Chi Minh guy is leaving behind-a country, yet again, betrayed. What do you think now - Hanoi Jane?