A little Question: How to express "good wishness for somebody or something forever" in native English?

"All the best!" serves all your purpose.

/Sameer

Thanks for your reply.
I'am writing to the public rather than one to one, so I must specify a target, should I use "Sth, all the best!" or "All the best for sth" ?
Sth here is a product of our company.

You said "Sth" is a product; but, why should you wish a non-living thing? [:^)]

If it was a "someone" instead, then "All the best ABC!" would serve the purpose. [Say, ABC is the name of that person]

/Sameer

The product was born years ago. Many people have devoted most of theire time and energy to the process of its development and this process will go on, but you have to quit this for some reason.

Then can't you say that you "wish" the product to be perfect some day or to be selling well tomorrow?

You can say "To the success of XYZ."
That means that you hope the product is successful and the people who worked hard to create it will take pleasure in its success.

Can you give me an example about the usage of "To the success of XYZ" with its context?
Somehow I feel it's more a phrase than a sentence.

It is a phase. It would be something you drink a toast to, or write on a card.

How do you plan to use this expression? What type of communication?

Thanks very much, I have known what you mean.