三岁昕

'Three-year-old Xin'. Here Xin (昕) refers to dawn or a bright new beginning. By calling themselves three years old, this person shows that they possess childlike innocence and optimism for every day. Although young in mind, this does not prevent them from having aspirations, hopes, dreams, and ambitions towards the future. So this username signifies simplicity and purity while holding onto the wonder of a fresh start.