天舟九号货运飞船已受控再入大气层

Uses '已于' (yǐ yú) to indicate an action that has already been completed at a specific time. '已' means 'already' and '于' means 'at/on'. This formal structure is common in news and official announcements.

Uses '据' (jù) followed by a source and '消息' (message/news) to cite information. This pattern means 'according to' and is frequently used in formal writing and news reports to attribute information to a source.

Uses '为' (wèi) to express purpose, meaning 'for' or 'in order to'. The structure is '为 + recipient/beneficiary + verb + object'. This formal pattern shows the purpose or beneficiary of an action.

Uses '于' (yú) as a formal preposition meaning 'at' or 'in' to indicate when or where an action takes place. More formal than '在', commonly used in written Chinese, news, and official documents.

Uses '等' (děng) after a list of items to mean 'and so on', 'etc.', or 'and others'. It indicates that the list is not exhaustive and there are more similar items not mentioned.