We are pleased to announce that our colleague Lixin Du has successfully defended her Ph.D. studies today. Her thesis was written under the joint supervision of Shaoshi Chen from the Chinese Academy of Sciences and Manuel Kauers, and during the time she spent in Austria, she was supported by an FWF project on integral D-finite functions. In her thesis, she explores the notion of integrality and its applications to reduction-based algorithms for symbolic integration. Some of her results have already been published at ISSAC, the annual flagship conference in the area of computer algebra. We congratulate Lixin on her achievements and are happy that she will stay at the Institute for Algebra for some more time as a postdoc.