桐梓

桐梓	Tóng zǐ	Taongzi county in Zunyi 遵义, Guizhou
桐	tóng	tree name (variously Paulownia, Firmiana or Aleurites)
梓	zǐ	Chinese catalpa (Catalpa ovata), a tree that serves as a symbol of one's hometown and whose wood is used to make various items / (bound form) printing blocks