Lea did not reply and reached for a bunch of leaves tied with tree vines before handing it to Elvis. He then gave Elvis many dried ginger and said, "She always liked strange stuff, just like how she always treat stuff that people throw to the floor and not pick them up as babies."
Elvis received the things from Lea and brought it closer to his nose to smell it. He realized that the bunch of tree leaves contained salt crystals. The way the package was being tied was identical to Gu Mengmeng's method. That implied that Lea was there too when they were extracting the salt from the lake this morning but... he did not notice him at all.
At that moment, Elvis experienced the meaning behind what Lea had said, "The Beast World is extremely dangerous, one male is not enough to protect Gu Mengmeng.". If the one who followed them today was not Lea, and instead others, then...