C76 Another use of colored bamboo

"Of course it does." Chu Yuhan said, "My guess is that the Dual Winged Demon Snakes have laid many threads in the forest, and as long as someone touches these threads, the Snake will be able to sense them."

Chu Yuhan didn't dare to say the word infrared, she was afraid that Chu Xingran was trying to find out more about it.

Chu Xingran was also a smart person, so when he heard Chu Yuhan's words