久溺深海护一道伤久居深巷守一道光
[jiŭ nì shēn hăi hù yī dào shāng jiŭ jū shēn xiàng shŏu yī dào guāng]
It paints a poetic picture about living under water deep sea (indicating a state of emotional submergence, often related to grief) while shielding a scar, also quietly dwelling in a secluded area (which may represent loneliness), cherishing or guarding something valuable (such as a glimmer of hope)