碳链

碳 = 炭 + 石 : Tecumseh (t) further processes the charcoal (炭) he made in the anthill's bathroom (an4) into pure carbon (碳) by crushing the charcoal (炭) into its elements and exerting extreme pressure with a rock (石).

链 = 连 + 钅 : Li Qingzhao (li) has been kidnapped and chained down (连) in the anthill's bathroom (an4). Luckily she has a tiny golden harpoon (钅) as a necklace (链) around her neck which she is able to pick up with her mouth, and with which she is able to pick the lock.