I was confused about the relationship of some singers' songs and

It does affect my appreciation of some singers's songs. Now I am clear after I read answers from FeiDu, TianLan and XiaoMu' wise comments. I do appreciate their help. And I can enjoy listening to songs on the singing forum better. Thanks for your reminding. Please do me a favor. I need to copy this comments after I get home this evening.After that I am going to ask our Forum administrator to delete my question. Please bear with me.Sorry, I can not type in Chinese now. Have a good day!