Reconfigurable Intelligent Surface (RIS) has been widely studied in both academia and industry in recent years. A series of RIS prototypes have been launched by colleges and companies in different regions, and various tests & verifications have been done. Based on the field trial, a promising coverage/capacity performance gain can be observed. All these progresses reveal the potential capability of RIS for future wireless network. In 2025, the study on 6G in 3GPP will be initiated. This white paper, therefore, aims to bridge the gap between academic exploration and industrial implementation by proposing practical directions for RIS-related standardization. Through the collaborative input of various companies and research institutes, it provides insights into different RIS architectures, outlines high-level design principles, and proposes potential standardization work across system architecture, control information, reference signal, and beam management. It is hoped that this white paper can serve as a foundation to facilitate industry consensus and accelerate the inclusion of RIS into global 6G standardization activities.