Literature Reference: 畴昔同幽谷，伊尔迁乔木。—— 《赠蔡君》 Once we shared the same secluded valley, now you have moved to the lofty trees. Source from 'To Cai Jun'.
同: Identical; the same.
幽: Serene and concealed, it embodies elegance and composure.
Meaning: 'Tong You' signifies sharing a serene valley together, symbolizing profound friendship and a tranquil state of mind.