There are so many chinese brands in the market, but if you want to buy a premium one, then go with the Samsung Galaxy M40. If compared with other device brands in this price segment, this phone have a powerful processor which runs very smooth games and apps, also the camera quality is simply amazing. I really loved it's superamoled display, which is very good and vibrant, helps in watching full hd videos and movies with very sharp and crisp images. It also sports a bigger battery which lasts very long.
The thing I am giving it a 4 star rating is that, while doing heavy gaming for a longer period, the back near camera turns a little hot comparing other phones, otherwise it's best premium phone overall.