Email: zcli@cumtb.edu.cn 9 4 National Geomatics Center of China, Beijing 100830, China; zhangpeng@ngcc.cn; ys@ngcc.cn 10 * Correspondence: zcli@cumtb.edu.cn;Tel.
The goal of this paper is to derive 13 the geopotential value for the Chinese height datum (CNHD) in order to realize the height datum 14 unification in China.