Who was the undercover in the period when Hong Lei was the captain?

When Honglei was the captain, Huang Lei and Xiaozhu were undercover. Inquiry based on public information. The episode when Hong Lei was the captain was the 8th episode of the second season of Extreme Challenge. The undercover agents in that episode were Huang Lei and Xiaozhu. Extreme Challenge is a large-scale inspirational experience reality show launched by Shanghai Dragon TV and participated by Huang Bo, Sun Honglei, Huang Lei, Luo Zhixiang, Wang Xun, and Zhang Yixing.