"Stressed by a Mountain of Books" was Song Shuhang's earliest chat group nickname.
Later, he changed his nickname in the Nine Provinces Number One Group many times. He once rotated between seven daoist names, but the ones he recently used a lot more were Tyrannical Song and Tyrannical Saber Song One.
Currently, none of the seniors in the Nine Provinces Number One Group called him "little friend Stressed by a Mountain of Books" anymore.
...Unless it was a private message for Song Shuhang, and they had only seen Song Shuhang's account name?
However, Island Master Tian Tiankong was an acquaintance. Even if it was a private message, it would still be impossible for him to call him "Little Friend Stressed by a Mountain of Books".
Unless... It wasn't Island Master Tian Tiankong himself who was the one that sent the message?