Microsoft yahei is not commercially available.

Microsoft Yahei can be used in win system, but it can't be commercialized. Blizzard, a giant in the game field, has been claimed for using it. If the content designed with Microsoft Yahei font is commercialized, especially on a large scale, it is likely to attract lawsuits and compensation, then Microsoft Yahei can't be used.

Siyuan Bold is a font jointly designed by adobe and Google. Although it was jointly developed by the two companies, Google and adobe have different names for this font. Adobe design software usually calls it SourceHanSans (Siyuan Bold), while Google calls it NotoSansCJK. Siyuan boldface can be commercialized for free, and even the font can be modified.

There are 6,763 basic men in the handwriting designed by a great god, which can be used freely. The font is relatively delicate and the handwriting style can be used in slogan, posters, trademarks and other designs.

legal background:

according to article 14 of the company law of the people's Republic of China, as long as the legal persons are different, even if the parent company goes bankrupt, the subsidiaries can still operate normally.

The Copyright Law also stipulates that the copyright (except the right of signature) of the works of legal persons or entities without legal personality and the work of posts enjoyed by legal persons or entities without legal personality shall be protected for 5 years, ending on December 31st of the fiftieth year after the first publication of the works. However, if the works have not been published within 5 years after the completion of creation, this Law will no longer protect them.