Changan has a wider dealership network and seem very serious about their business in Pakistan.
Haval doesn't even have a dealership in Peshawar.
If you can afford the h6 hev or 2.0T then go for them. If not then oshan x7 is a value for money car with good features.
Not sure about resale though. H6 hev has good resale but can't say anything about oshan x7.