The article introduces technology application of soil-air type land source hot pump through main building engineering of TangShan institute north school region.

The same source says that the school is bankrolled by donations from Saudi Arabia, a disclosure that could complicate the U.S. relationship with one of its few Allies in the region.

Across the region, CCTs have boosted school enrollment from 1 to 10 percentage points, with larger effects in the higher grades.