Gym Management System Design, I used Java and Appsmith to design the gym management system. This includes the front-end and back-end development. The designed system allows users to create an account, sign in/out, and make plans for their gym activities. The system will report and reflect on users activities. Deepfake Detection, Using Python to train the neural network(GoogLeNet) in order to increase the precision of detecting AI-generated faces and real faces. Reversi Board-game Design, Using C programming language to design a reversi board game. The designed board game allows users to play single/double players. If users choose to play as single, an algorithm will play with them. Sample Marriage System, Implementing Object-Oriented Programming strategy to find the best match between candidate schools and students. The system should find the best match under certain constraints and report the matching results. Club Website Design, Design the user interface of the website and evaluate the usability, creating convenient environment for customer purchase and gathering club informations.