This is not an illusion.
Because mother and son both lost their human touch.
Li Lan must have been hungry; after sitting down at the dining table, she took a few small bags from the box underneath, and then slid one of them over to the boy sitting opposite.
Li Zhiyuan picked up the bag, opened it, and found compressed biscuits.
He had come here after finishing his tests in the afternoon and was indeed hungry now, but he didn't want to eat them; he wanted to save room in his stomach for eating Peking duck at Quanjude with Principal Wu tonight.
He didn't actually like the greasy duck that much, but now he was looking forward to it more than anything.
The boy didn't ask Li Lan how she knew "that seabed" had something to do with him, because that would be easy to look up.
He was Zheng Haiyang's classmate, had accompanied Tan Yunlong on a visit to Zheng Haiyang's mother at the mental hospital, and bought tickets to Mountain City with Tan Wenbin.