Then for 7 years, she traveled around the world and her experience was published into best-selling series of "Daughter of the Wind: Three and a Half Times Around the Globe on Foot". Her travel around the Korean Peninsula 'Daughter of the Wind, A journey round Korea' also became a best-seller, making her a public figure as a famous author. Since then, Han worked as a team leader of emergency aid team in the international NGO World Vision from 2001 to 2009. In August 2009, she left again for the masters degree in the 'Fletcher school of law and diplomacy'.She was nominated a "YWCA Youth leader awards" in 2004, "One of the “100 people brightening the world”", being one of the most respected figure among youth and intellectuals.