Xiaomis' Redmi G Pro 27U is a 4K monitor, while the G Pro 27i is a 2K one; not on the same league.
How is it surprising that it will cost more in US than in China? It was always the case even before tariffs (this stuff gets produced there so it costs less). It is just that the price difference is even greater now.
There is also the new Xiaomi Redmi g pro 27q