Why did Wei Qi and Zhao Meixin end up together?

Because they found that they still love each other deeply, here are some details:

Synopsis of 26 episodes: Zhao came to the ballroom in the middle of the night and found Qi Wei, saying that he could not lose his beloved. Qi Wei, on the other hand, was expressionless, saying that Zhao had been so cruel to herself before, and she was unmoved when she was released from prison, and now she loves herself. Zhao was pale and trembling, saying that she had misunderstood him. She thought that Qi Wei still loved herself and turned to leave. Just as Zhao was about to leave, Wei Qi rushed up and gave Zhao a good kiss. It rained heavily that night and two people had sex. Meanwhile, Niu Rongshu and Niu Guo Cheng are waiting for their lovers to come home.

The War between Two Women is an emotional drama jointly produced by Shanghai New Culture Media Group Co., Ltd. and Shanghai Yuxing Culture Media Co., Ltd., directed by Yu Ding and starring Ada, Nikita and Zhou Yiwei.

The play tells the story of educated youth Niu and Zhao, two women with different family backgrounds and different personalities. Because I fell in love with the same man, I began a love struggle that spanned the times.

The play premiered in Shi Jing, Hubei Province on August 25th, 20 15.

References:

The war between two women Baidu Encyclopedia