Prof Xiulin Ruan at Purdue University visited HEG at Tsinghua University on August 7. He presented his recent research about "Higher-order and non-equilibrium phonon transport in emerging materials: Predictions guiding experiments"in HEG, and discussed our future collaborations with HEG members. He will stay in Bejing for about 10 days, during which the IHTC16 will be held in Beijing.