Hi, and thank you for your interest!
Open Event is being translated using Weblate, a web tool designed to ease translating for both developers and translators.
Translation project for Open Event into Chinese (Simplified) currently contains 836 strings for translation and is 29.3% complete.
If you would like to contribute to translation of Open Event, you need to register on this server.
Once you have activated your account just proceed to the translation section.