Today we say farewell to Guan-Wen Yuan, who after an extremely successful 2 years as a postdoc in my group, is now returning to China to take up a senior researcher position at USTC. To say goodbye to Guan-Wen, a bunch of us from the Theoretical Gravitation and Cosmology Group went for an extremely nice Chinese dinner at China Gusto, easily one of the best Chinese places in Trento: below is a picture of us, from left to right we see Luciano Vanzo, Max Rinaldi, Sergio Zerbini, Marco Calzà, Guan-Wen Yuan, yours sincerely, Davide Pedrotti, and Miguel Sabogal. Guan-Wen’s time here was extremely productive, and aside from our 2 papers together he made several important contributions to my group’s activities. Thanks a lot Guan-Wen for everything you taught me, and best of luck for the next chapter of your career back in China!