3KM collects and uses the minimum amount of personal information as follows to process user inquiries. Collected items: [Required] Email address, UID (membership number), inquiry content [Optional] Device information, payment records (payment account, order number, payment date and time, etc.) Purpose of collection: Collection to process customer inquiries and provide services Retention period: Personal information is stored for 3 years from the date of initial collection in accordance with relevant laws and regulations.