杭州先为达生物科技股份有限公司-B向港交所提交上市申请书

向 is a preposition meaning "to" or "towards." It introduces the target of an action, especially with reporting, submitting, explaining, or speaking. In news and formal writing, it often appears before organizations or institutions.

为 in formal written Chinese can mean "to be" or "to serve as." It is often used to identify a role, status, or title, especially in business and news language.

据 means "according to" when introducing a source of information. It is very common in journalistic and formal contexts to cite where the information comes from.

获悉 is a formal written verb meaning "to learn" or "to be informed." In news writing, "某媒体/某机构获悉" introduces information that the source has obtained.

In written Chinese, commas often connect related clauses without an explicit conjunction. The second clause may add source information, result, or further explanation. Learners should notice how Chinese frequently links ideas through punctuation rather than words like "and" or "that."