The Vietnamese sister-in-law belongs to an extreme love in an extreme environment.

There are indeed such people.
It reminded me of A, who opened an exchange in Vietnam before the pandemic (a friend made it up).
Met a Vietnamese girlfriend through normal channels
Excellent, motivated, good at English, friendly
After several mutual tests, we got together.
But later, due to the pandemic, I was separated from my Vietnamese girlfriend.
Can't meet for two or three years.
This relationship eventually came to an end without any resolution.
It can also be seen as a microcosm of the fate of ordinary people against the backdrop of special times.