Yinan Shangguan developed a comprehensive product reviews system for the betca-tpv-core and betca-tpv-angular repositories, enabling users to create, retrieve, update, and delete reviews with purchaser validation and popularity-based article ranking. The backend leveraged Java, Spring Boot, and MongoDB to implement domain modeling, persistence, and RESTful APIs, while the frontend used Angular and TypeScript to deliver an integrated review component and service. Yinan expanded test coverage with unit and integration tests to ensure reliability and addressed critical service issues. This work provided a robust, data-driven foundation for user engagement and surfaced the most popular articles based on reviews.