辛: Surname, diligent, spicy.
杜: Du Kang, Du Fu. The character "Du" refers to the sweet pear tree, as stated in the "Shuowen Jiezi" dictionary: "The male is called 'Tang', and the female is called 'Du'."
Meaning: The name has a harmonious rhythm, with 'Xin' symbolizing diligence and perseverance, while 'Du' conveys a sense of stability and restraint.