Hi, and thank you for your interest!
landing-page is being translated using Weblate, a web tool designed to ease translating for both developers and translators.
Translation project for landing-page into Chinese (China) currently contains 54 strings for translation and is 88.8% complete.
If you would like to contribute to translation of landing-page, you need to register on this server.
Once you have activated your account just proceed to the translation section.