Feng, I recommend you review the idea that there are many pros hear that need to be shown. If someone asks for help, then kindly, and without arrogance, offer that help.
BUT, I would lose the idea that there are enough guys here that need to have you show them something, that would warrant you taking the initiative to "show" them how to make a repair. That is a big leap to make such an assumption.
Feng, let me say that I do think you could be a valuable contributor to the forum. You put a lot of effort into your posts, upload pictures, and you also keep track of your threads and respond to others' comments. I'd advise you to adjust your attitude towards others, though.
An alternative way to share your work would be to make threads in the wall of pride section where you can chronicle your troubleshooting and repairing adventures.