Simon, Kit, Ken, Derik and William, thank you very much for your help.
Finally, I'm success to have my GG work today and I'm enjoying my music now. It's so amazing for a layman like me to complete my first DIY pre-amp. I found it's difficult to describe how wonderful it is. Surely, it's my first and not the last one.
Thanks for your organising this DIY course and your help.
I would also like to thank AV攻略 and HiFi Fever for organising such a wonderful DIY course for me (and the others). In particular, I would like to thank Simon, Kit, 狗記, William & Owen for their help. Without them, my pre-amp may still be 'Under Construction'.