Dou Dou, alone from a corner, walked into the lake and began to dive continuously. Nian Shutong followed behind, and after swimming to an unknown depth, Dou Dou found a door of unknown material among a pile of water plants.
A square board about one meter square, underwater Dou Dou pointed to it for Nian Shutong.
Nian Shutong understood, went forward, and pulled the board open, magically, the lake water did not enter inside, there seemed to be a transparent gelatinous layer blocking it.
Dou Dou looked at Nian Shutong, smiled at her, swam over, hugged her briefly, and quickly retreated, swimming towards the opening.
Nian Shutong saw Dou Dou press one hand on the gelatinous surface, a light flashed, as if verifying some information, and in the next second, Dou Dou's hand passed through.
Dou Dou nodded to Nian Shutong, then his entire head, body, legs, and feet went through.
After Dou Dou went in, another light flashed, and the board automatically closed.
