1 升级Blue --3,000-- Blue Plus --16,000-- Silver --3,8000—Gold。很明白了，但是
3.3 As each membership status level is awarded, all membership status miles will be returned to zero, and no residual miles will be carried forward into the next membership status year.
假如我现在是Blue Plus，然后飞了30,000，那么我升了Silver后账户里的status miles余额是0。而不是14,000。我理解的对吗？
3.1 To retain your Blue Plus, Silver or Gold membership you must maintain the appropriate levels of Membership Status Miles or where available, pay any applicable fees in each membership year.
3 里程有效期 12+12
11.3 Members who have not recorded any activity with bmi, its Diamond Club partners, or made a redemption with the same parties and other promotional third parties, for a 12 month period, from the date of their last recorded activity on the Diamond Club database, shall be deemed dormant. If no claim is made on any residual Destinations Miles on that member’s account, membership may be terminated after a further 12 months and all remaining miles forfeited.