Chapter 3 is published as Weiming Zhuang, Xin Gan, Yonggang Wen, and Shuai Zhang, "EasyFL: A Low-code Federated Learning Platform for Dummies", IEEE Internet of Things Journal (IOT-J), 2022. The contributions of the co-authors are as follows:• I proposed the idea, designed the system architecture, wrote the manuscript, and revised the paper.• Xin Gan and I co-implemented the system and conducted the experiments.• Prof. Yonggang Wen provided insightful comments on the idea, the system, and the manuscript.