Where is the graveyard of the third child of hawthorn tree love? Pray for the great gods.

The third child left, and according to his last wish, his body was cremated and buried under the hawthorn tree. Before he died, the third child gave his diary, letters and photos to his younger brother, telling him not to give them to Jingqiu if she was happy. If her love is not smooth, or her marriage is not happy, give these things to her and let her know that there was someone in this world who loved her wholeheartedly. The title page of the third diary reads: "I can't wait for you for a year and a month, and I can't wait for you to be twenty-five, but I will wait for you all my life."