From April 7th to April 10th, Prof. Hu attened the CCS colloids and interface science conference, which was held in Xi'an, Shannxi Province. During this event, Prof. Hu gave an oral presentation entitled "Synthesis and preparation of Ruthenium-functionalized photoresponsive polymer hydrogel-based microobjects and the study of their photoresponsive properties". Prof. Hu also made very fruitful discussions with peers from different institutions.