Core Viewpoint - The article provides a comprehensive guide on how to apply for transaction disputes related to credit card usage, emphasizing the self-service application process available through the China Construction Bank mobile app [2][3][23]. Group 1: Application Process - Users can apply for transaction disputes for credit card transactions or cash withdrawals made within the last 50 days [3]. - To initiate a dispute, users must log into the China Construction Bank mobile app, navigate to the credit card section, and select the transaction in question to apply for a dispute [4][20]. - The application process includes selecting the type of dispute, providing necessary information, and submitting supporting documents if required [9][14][16]. Group 2: Types of Disputes - There are several categories for disputes, including "No Memory of Transaction," "Denial of Participation in Transaction," and "Participation in Transaction but with Doubts" [8][9][14][16]. - For "No Memory of Transaction," users can choose to receive updates via SMS or through self-service queries in the app [9]. - In cases of "Denial of Participation," users are advised to lock their cards to prevent further risks and must fill out a dispute declaration form [14][15]. Group 3: Follow-Up and Communication - After submitting a dispute application, users will receive a dispute reference number and may be contacted via SMS or phone for further information [9][14][16]. - Users can track the progress of their dispute through the mobile app by entering the dispute reference number [20].