Should I perform travel prayer after moving to a new city while regularly returning to my old city?

I live in a city called **Lahore** and I was able to find a job in another city called **Mianwali** (430 Kms away). After moving there, I visit my family weekly or fortnightly (12 ~ 13 days). Should I make Qasr when I pray in **Mianwali**? Moreover, It is worth mentioning that I have a house, car, and a servant in **Mianwali**.