Yes, this font is from Google and is completely open. Unlike the Founder font, I will let you use it first and then give you a lawyer's letter. For this kind of problem, it is recommended that you read the relevant terms of the license yourself. The license used by Siyuan Heidi is Apache License 2.0. Simply put, Siyuan Heidi can be used for commercial purposes, but there are some requirements: an Apache agreement must be attached with your product; if the code is modified, it needs to be modified. Indicate these modifications in the file; the protocol, trademark, patent statement of the original code, and instructions required by the original author need to be noted in the derived code; the Readme file of your product (if any) needs to include the Apache protocol, and in The Apache protocol must not be modified in the Readme. Siyuan Heidi is an open source font announced by Adobe and Google in July 2014 after three years. It is a new open source Pan-CJK font family for desktop use. It has seven font weights (ExtraLight, Light, Normal , Regular, Medium, Bold and Heavy), with full support for Traditional Chinese, Simplified Chinese, Japanese and Korean, all in one font. It also includes Latin, Greek and Cyrillic glyphs from our popular Source Sans font family.

The people who speak Chinese, Japanese, and Korean account for about a quarter of the world's population. Google has been committed to providing high-quality information services to users in various languages ??around the world, including users in China, Japan and Korea. To this end, Google and Adobe have developed an excellent free font for users in China, Japan and South Korea: NotoSans CJK. It can bring people a pleasant and efficient information reading experience. Noto SansCJK fully supports Traditional Chinese, Simplified Chinese, Japanese and Korean in one font, taking into account support for different writing conventions in the four languages. It is a bold font. For Simplified Chinese, it supports all Chinese characters specified in the Chinese national standard GB18030 and the "General Standard Chinese Character List" promulgated by the Ministry of Education in 2013.