How many feet above the runway elevation must the runway entrance of Nanjing Lukou Airport be?

50 feet. According to the inquired runway elevation data, the runway entrance of Nanjing Lukou Airport must be more than 50 feet higher than the runway elevation, and the vertical distance between the highest point of the runway landing area and the average sea level is called the airport elevation. First of all, the reference height for calculating QFE value should be the airport elevation. QFE (if necessary) shall refer to the elevation of the relevant runway entrance for non-precision approach runways and precision approach runways where the runway entrance is more than 2m (7ft) below the airport elevation.