Usually, the market phones in the premium budget range offer dust and waterproof features. This is one feature that is bound to attract everyone easily. Because with dustproof and waterproof confirmation, there is no more fear with the phone.
Although the Oppo Reno8 pro (china) phone is considered expensive, there is no confirmation of waterproofing and dustproof in this phone. So the phone does not support dust resistant feature. You have to be careful with the phone for this, and you can additionally use a waterproof case if you want.