http://webcache.googleusercontent.com/search?q=cache:INSERTWEBADDRESSHERE Copy paste above web address but replace INSERTWEBHERE with the site address that is down. Example web address that is currently down: https://plumlizi.com/2019/06/06/i-am-a-matchmaker-on-taobao-chapter-10/
You can also use Web Archive (https://archive.org/web/). The Internet Archive is a nonprofit dedicated to preserving the internet. It regularly saves copies of every page it can get its hands on, and this often includes the translation sites we read here. It is usually slower to use than google's cache of a given site, but will allow you to navigate the site as if it was up and running normally. Next and Previous buttons will work, for example. It's important to keep both in mind as some sites are not cached by google, some are not stored by Web Archive, some are picked up by both, and some are picked up by neither. When one fails you, knowing the other exists gives you a second option to try. You can also use the Internet Archive to see a site's history. It does not just keep a single, up to date copy of any given site, but regularly makes new copies in addition to the old. If something has been removed from a site for any reason, you can often find it on an old version of that site, courtesy of the archive.
I just use wayback machine, similar result, hella easier on mobile. Might not be as complete tho, since it's user submitted. Manage to read all the old Korea stuff that used to be on wuxia-something(the one coiling drag was on?)
They have a manga hosting site now, Wutopia I think? I saw some KR and CN novels and they said it's all licensed, cool.
just type cache: in front of the webpage url, it should give the same result Edit: This works in chrome, not sure about other browsers