@ 李汉伦 Thanks for bringing this to our attention. As you know, italki is primarily developed in China and sometimes we get so excited to share all our new changes with members, that we don't have a chance to check every phrase and every little piece of the site before it goes live. (I'm sure you've also found this with some technical bugs as well.) We do appreciate any and all feedback for all language versions of the site, and we do rely on the italki community to bring translation, spelling, and other mistakes to our attention. A good way to inform us is by emailing [email protected] to tell us what the problem is and how to correct it. We are working on fixing the grammatical error you pointed out, as well as other bugs our members encounter. If you have any more suggestions or corrections, please forward them to us via email. Thanks!