Before which solar term does Zhao intend to arrive in Tokyo?

Grain Rain. Zhao is a character in The Dream of Flowers, an inspirational women's drama directed by Yang Yang and co-starring Liu Yifei, Chen Xiao, Ada, Jelly Lin, Joe, Dai Xu, Zhang, Yao Anlian and Jianfeng Bao. The play is based on Guan Hanqing's Yuan Zaju "Zhao's Romantic Rescue". It tells the story of three women who bravely broke into Bianjing after all kinds of difficulties. With the help of Gu of Huangchengsi, their sister Qi Xin finally turned Yong 'an Building into the largest restaurant in Bianjing through her own efforts. Zhao Paner saved Ouyang Xu three years ago. After three years of study and life to make money, he expects his Ouyang official to come back to marry her in high school. But he was waiting for Ouyang, but he wanted to break off an engagement on the day of Grain Rain and marry Miss Gaos thought. Zhao doesn't believe that Ouyang Xu is such an ungrateful person at all. If he is forced to marry another person, according to his temper, he should also write a letter to himself explaining the reason, instead of letting others take a message. In order to prevent someone from trying to ruin his career and accuse him of infidelity, Zhao decided to go to Tokyo to find Ouyang Xu before Grain Rain and ask him face to face.