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I have been 301 to new url and now when I put old url, i will go to new url. Can you think it's good?

I have an article which have high rank on Google. But recent, I use mod rewrite url so this article have new url.

old: mywebsite.com/c1/p-1

new: mywebsite.com/c-e/p-1

Now, google is indexing old url. I want to ask when I build linking to my site, which link should I use for link building? I should build linking for new url or old url.

Thanks