How did Wang Jian fall into the water?

Shang Chun threw it into the river. According to the details of the TV series "Flowers Bloom and Flowers Fall", Wang Jian is the youngest son of the Wangs. Shang Chun has been coveting the property of the Wangs and wants to annex it. After many failed attempts, Shang Chun became angry. Among them, Wang Jian fell into the water because he found criminal evidence of Shang Chun. Shang Chun jumped over the wall and seriously injured Wang Jian, then threw him into the river, causing Wang Jian to be unconscious.