Fundamentals of Triboelectric Nanogenerator. Overview of Triboelectric Nanogenerators / Xiaosheng Zhang -- Structures of Triboelectric Nanogenerators / Haixia Zhang -- Fabrication of Triboelectric Nanogenerators / Bo Meng -- Characterization of Triboelectric Nanogenerators / Yu Song -- Power Management of Triboelectric Nanogenerators / Xiaoliang Cheng -- Approaches to Flexible and Stretchable Device. Overview of Flexible and Stretchable Approaches / Mengdi Han -- Flexible and Stretchable Devices from 0D Nanomaterials / Zongming Su -- Flexible and Stretchable Devices from 1D Nanomaterials / Liming Miao -- Flexible and Stretchable Devices from 2D Nanomaterials / Jinxin Zhang -- Flexible and Stretchable Devices from Unconventional 3D Structural Design / Hangbo Zhao, Mengdi Han -- Flexible and Stretchable Devices from Other Materials / Haotian Chen -- Self-Powered Smart System. Active Sensors / Xuexian Chen -- Hybrid Sensing Technology / Xiaosheng Zhang, Yanyuan Ba, Mengdi Han -- Smart Actuators / Xiaosheng Zhang, Zhaohui Wu -- Flexible and Stretchable Electronic Skin / Mayue Shi, Hanxiang Wu -- Applications of Flexible and Stretchable Self-Powered Smart System. All-in-One Self-Powered Microsystems / Xiaosheng Zhang, Danliang Wen -- Applications in Biomedical Systems / Cunman Liang, Mengdi Han -- Applications in Internet of Things and Artificial Intelligence / Mayue Shi, Hanxiang Wu -- Applications in Environmental Monitoring/Protection / Hang Guo, Wei Tang.