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This pattern is used to show a change in quantity, amount, or level from one number to a higher one. “由” introduces the starting point, and “增至” means “increase to” the new amount. It is very common in business, finance, and news writing.

This structure is used when a new person, company, or item is officially added in a certain role or status. “新增” means “newly added,” and “为” indicates the role or identity after the change. It often appears in legal, corporate, and formal contexts.

This pattern shows that several people or organizations do something together. “由” introduces the agents, and “共同” emphasizes joint action. It is often used in formal written Chinese to describe shared ownership, responsibility, or participation.

This pattern is used to list examples without giving a complete list. “包括” means “include,” and “等” means “etc.” Together they indicate that the listed items are only part of a larger category. This is very common in definitions, business descriptions, and formal writing.

In formal Chinese, “为” is often used instead of “是” to indicate identity, role, or status. It is especially common in written language, legal documents, and business reports. Here it marks who serves in a specific position.