Mainland Chinese Translators required for Science and Maths class conducted in English in Southern China

We need translators to on-the-spot translate teaching of Science, Maths and Coding in English to Chinese for primary and secondary students. Translators will have to fly to Southern China such as Guangzhou, Guangxi, Shenzhen where the classes are held. Classes will be for a total of 12 to 24 hours to be spread over 3 to 4 days. Translators preferably should be someone who are currently residing in Southern China. Translators need to be familiar with Chinese academic terms locally as well as international English academic terms to be able to do the job well.