Huangpu district.

1. Huangpu District, the center of business, has a developed economy, many rich people, and the order amount for take-out is relatively large, so the unit price of take-out is high.

2. In Pudong, there are few commercial centers, and the order amount for take-out is relatively small, so take-out is expensive. Therefore, the unit price of takeaway in Huangpu District is high.