Unless you include a license that specifies otherwise, nobody else can use, copy, distribute, or modify your work without being at risk of take-downs, shake-downs, or litigation. Once the work has other contributors (each a copyright holder), “nobody” starts including you.
Hello @liutinglt,
Thanks for sharing your project! May I ask you to add the LICENSE file, please?
https://choosealicense.com/no-permission/
Thanks!