They need to be well-trained in Chinese and English languages so they understand the local culture. Working in Hong Kong is generally better than in Malaysia.
You currently have access to a subset of Twitter API v2 endpoints and limited v1.1 endpoints (e.g. media post, oauth) only. If you need access to this endpoint, you may need a different access level. You can learn more here: https://developer.twitter.com/en/portal/product