Why China Lost Trust in Vietnam?

Vietnam once turned away from its largest patron.

When China and the Soviet Union split, Vietnam was forced to choose.

And it leaned toward Moscow.

Cam Ranh became a Soviet military base.

In Beijing’s strategic thinking, this was not merely a diplomatic decision.

It was a profound strategic reversal.

A country once seen as a frontline ally had now allowed China’s primary rival to establish a military presence right along its border.

From that moment, a conclusion began to take shape inside Beijing’s strategic mindset.

Vietnam was not a reliable ally.

And that was only the beginning.