史上第八只千元股诞生，股价1年涨近6.9倍

Used to indicate the basis or standard for calculation. The structure means “to calculate using … as the basis.” It is common in formal, financial, and statistical Chinese.

Used to show that a person or thing changes into a new identity, status, or category. In news writing, it often introduces an achieved ranking or title.

Used to set a scope, field, or range, meaning “in,” “within,” or “among.” It helps locate a fact inside a larger group or context.

分别 is used when listing items and matching them one by one with corresponding information. 分别为 introduces corresponding results or names, while 分别于 introduces corresponding times or places.

This pattern contrasts past and present status, meaning “at some point in the past or at present.” It is useful for describing whether a condition existed before, exists now, or both.