回複：入籍需要的時間

If you continue to meet this requierment:
在中國挺留沒有超過6個月,我在美國是符合5年住滿2.5年的規定 during all the pending time, you are fine. For example, if N400 takes a year till June 2010, then the 5 years prior to June 2010, you still need to live > 2.5 years in US, (not 2.5 in the past six years.)