I looked at the links you pointed out. For the first time, I explicitly put forward that the Doppler effect of gravitational field starts from March 24, 2020. http://www.sciforums.com/threads/a-story-about-special-relativity-who-can-explain-it？.162954/page-10 http://www.scienceforums.com/topic/36585-doppler-effect-of-gravitational-field/?p=382952 But I also noticed that in Feb 22 2020 04:03 am, I have used the Title Doppler effect of gravity field. And I can basically make sure that the title is not modified later. Just now I made a try. I can't change the title. In this forum, with the discussion of scholars, let me deduce this idea and verify it in mercury precession. Well, you let me rearrange the history of this topic. I hope that we will focus on the gravitational field later. For hundreds of years, scientists have tried to modify the equation of gravitation, and now we have. I hope our discussion will make this theory more perfect and play a role in specific scientific research.