The rules of this challenge clearly state that plagiarism is not permitted.
We have found similar content: https://pixabay.com/zh/%E5%B9%BB%E6%83%B3-%E9%98%B4%E6%B2%89-%E6%81%90%E6%83%A7-gespenstig-%E5%BE%88%E5%A5%87%E6%80%AA-%E4%BB%A4%E4%BA%BA%E6%AF%9B%E9%AA%A8%E6%82%9A%E7%84%B6-2530602/
Not indicating that the content you copy/paste is not your original art could be seen as plagiarism.
Repeated plagiarized art posts are considered spam. Spam is discouraged by the community, and may result in action from the cheetah bot.
If you are actually the original author, please do reply to let us know!
Thank You,
More Info: Abuse Guide - 2017.