What does Camping Zhang Wansen want to ask Chen Beixing?

While camping, Zhang Wansen wanted to ask Chen Beixing about the lighthouse.

According to Douban Movie Search, in the TV series "Twinkle Twinkle Star", Chen Beixing and Zhang Wansen met Lei Ge's people while camping. In order to protect Chen Beixing, Zhang Wansen was killed by Lei Ge's men. People were beaten to death. Chen Beixing accidentally traveled back in time and went camping with Zhang Wansen after the college entrance examination. During this period, he asked Zhang Wansen about the origin of the lighthouse, but Zhang Wansen said it was a secret.