Who was Wu Thirteen in Life and Death with at last?

In the Sirius War, Wu and Fang Biyi were together.

According to Douban query, Fang Biyi in the 33rd episode of "Wolf Warriors" went to Yancheng gloomily with the team's carriage. Wu Thirteen rode to catch up with the team, and Wu Thirteen grabbed Fang Biyi's hand and loudly confessed to her. Wolf Warriors is an anti-Japanese drama produced by Zhejiang Dongyang Tianmu Film Co., Ltd., directed jointly by Zhang Dongdong and Liu Di, starring Zhang Duo, Yu Zhen, Zhang Guangbei, Jungle, Chu Xu and Wang Lingling. The play tells the story of two brothers, Wu and Jason Wu, who heroically killed the enemy and defended their country on the battlefield, and finally established a new five companies to usher in the victory of the Anti-Japanese War.