Soon to drop back to Green (My Silver membership ends 31/7/2011) (I fly less this year......

), some questions to ask:
1.Does CX implement a very strict policy of regaining Silver tier?
2.As a CX Green member, which CX lounge in HKG is better in value for a lounge access redemption?
3.Also, what's soft-landing about?
4.Also, is that real that the green membership is virtually a lifetime membership?