Thank you for your advice. We have rewritten the mean values. Please refer to page 16, Line 496.
The refined GFMs are evaluated by using high-quality GNSS/lev- 22 elling data, the results show that the quasi-geoid accuracy of the refined DIR_R6_EGM2008_RTM 23 model in China has the optimal accuracy, and compared with the EGM2008 model and the DIR_R6 24 model, this refined model in China is improved by 9.6 cm and 21.8 cm, and the improvement ranges 25 are 35.7% and 55.8%, respectively.