The northwest has became a hippopular travel destination since 2019 or so, among the urban white collar women particularly.

"Hip" is quite casual and perhaps gives the impression it's popular with young people.

It was around that time that I started to see an increasing amount of holiday photos infrom places like Xinjiang, Kubuqi Desert, and Gansu ,etc.,

The 'rule of three' is something that's quite common in speaking and writing, so I think it would be a good idea to use it here.

shared by people I wouldn't think they'would be interested therin places like those.

NIt's not that the northwest isn't refreshing, exciting or lack ofs breath-taking sceneries.y,

I think connecting these three sentences would be better.

Tbut the living conditions wasere poor and transportation inconvienient, and some regions couldan, in fact, still can be dangerous.,

Since the last part of the sentence refers to its current state, it needs to be in the present tense.

Sso it was once exclusiveonly visited by some of those more adventurous travellers and the outdoor enthusiasts.

As you can imagine, things have been changinged quite a bit.