Tang San went to find Rongrong at night in the thirtieth chapter of Douluo Continent. The content of this chapter was that Tang San and his spirit beasts had participated in the Spirit Master Academy's annual Spirit Douluo competition and met Rongrong in the process of the competition. Tang San had sacrificed his life to save Rongrong. This chapter was also one of the most important plots that laid the foundation for the development of the entire story.