Huanhuan

The book has been edited and approved by Yang Huanhuan and Zhang Xu. Cui Dayong, Zhang Zhibin, Zhang Yanhao, Liu Bing and Zang Yufei participated in the compilation. The publication of this book has been supported by National Natural Science Foundation and the Natural Science Foundation of Shandong Province, and has also been assisted by Qilu Normal University and Shandong Jianzhu University.