Whose children are Shuang and Da Zhuang?

According to the story of my second brother and second sister-in-law, Zhou Shuang and Da Zhuang have a child in their marriage, so Zhou Shuang's child is Da Zhuang. My Second Brother and Sister is a chronological drama directed by Liu Jiacheng and starring Yu Zhen, Hao Lei, Yu Yang, Zou Hanhong, Song Jiateng, Xu Nannan, Qian Bo, Yin Xinzi and Cui Baoyue.