The brothers Choko and Chorei (known as Zhang Xiao and Zhang Li) dutifully cared for their elderly mother. One day, as Choko returned home with an armful of cabbage, he encountered a band of robbers. The boy had nothing to offer them but his life, which he offered with one request: to deliver the cabbage to his mother before his death. The robbers agreed. When Choko returned to face his end, his brother Chorei had joined him, and offered his life in exchange for Choko’s life. The robbers were so touched by this show of selflessness that the boys were both released.