As Han Han, he might pay attention to some social welfare projects such as helping people in need. He may investigate and research diseases such as cancer to understand the latest treatment and prevention methods for these diseases and may use his writing skills to provide support and help to those who need treatment. At the same time, as a public figure, he may also be under the pressure of public opinion in society. He needs a sense of social responsibility and public awareness, so he may actively support and participate in some public welfare activities to contribute to society.