Extreme Challenge Luo Zhixiang said that seven or seven equals fourteen in the eighth episode of Extreme Challenge Season 1: Lost in Qingdao. At that time, Zhang Yixing drew the numbers. Luo Zhixiang and others guessed the numbers. Only if they guessed correctly can they save Huang Bo and others. Zhang Yixing The draw was 78. During the duet with Luo Zhixiang, Zhang Yixing sang "The Cowherd and the Weaver Girl meet on July 7th" and then asked "What is after July 7th", so Luo Zhixiang confidently said seventy-seventy-four, leaving Zhang Yixing speechless