According to 'SimSun & NSimSun font family', the vendor for this font is ZYEC, Copyright is: © Copyright ZHONGYI Electronic Co. 2001.
I would like to suggest you contact this font company directly.
There is an email address on this webpage Upper right corner, https://www.china-e.com.cn/. (Please Note: Since the web site is not hosted by Microsoft, the link may changed without notice. Microsoft does not guarantee the accuracy of this information. Besides, this webpage is in Chinese.)
Hope the information is helpful to you.
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