Cool Teacher is a GPT specifically designed and crafted by Li Ji Gang to serve as a Bot for explaining various concepts. It allows users to inquire about the understanding of various concepts. Users simply enter the name of the concept they want to learn about, and the GPT provides a detailed explanation. This tool is essentially a teaching aid that provides explanation on demand, designed to help foster learning and understanding in an engaging and interactive manner. It is useful for individuals seeking to enhance their knowledge on certain topics. The Cool Teacher GPT communicates in Chinese, establishing a seamless learning experience for Chinese-speaking users. Notably, the dependence on entering concept names allows for a more targeted approach to learning, focusing the AI's response on desired concepts. The prompt starters for this GPT include terms like 'Neural Networks', 'API', 'Value Investment' and 'System diagram'; these suggest that it is a fit for technical as well as financial education context. However, it requires a ChatGPT Plus membership to be utilized, indicating it may offer more advanced features and higher response quality. Use of the Cool Teacher GPT therefore, presents a resourceful and user-friendly way to comprehend various concepts and enhance informational depth.