Hey Chai,
Here 為 (pronounced in the second tone) means is (是). It's used in formal writing.
Also, you needn't put spaces in between the characters.
Laurence
27 octobre 2019
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"is".
29 octobre 2019
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A great question! “为” has two tones, wéi and wèi. Here the 为 in your sentence should be pronounced as wéi. It means “是”(roughly in English is “is”) .
Reference: 百度汉语, https://hanyu.baidu.com/zici/s?wd=为&query=为&srcid=28532&from=kg1&srcid=&query=为