Professors Wang and Luo and their group in the Department of Computer Science and Technology, Peking University (PKU), have recently introduced a new memory virtualization technique called Dynamic Memory Paravirtualization (DMP). With DMP, binary code in the guest operating system can be dynamically patched by the hypervisor for improved performance. Their study is published in Issue 53 (January 2010) of SCIENCE CHINA Information Sciences and is a significant contribution to system virtualization technology.