You can report bugs about my website, apps, or my programs via the contact form below.

Also, you can send an email to me to report my bugs: [email protected]


I am in China and my English grammar or pronunciations may wrong. If you found wrong English grammar or pronunciations from my blog articles or YouTube videos, please report it to me.

If you discovered me, my website or my apps infringe your privacy or copyright, do academic fraud or do bad actions (e. g. delete your files without your permission), please  Report Abuse.

Since June 9th, 2019, my website is protected by Google’s reCAPTCHA to reduce spam, I installed it on my website with my programming language knowledge.

If the reCAPTCHA is not shown on my website or there is a problem with my website’s reCAPTCHA, please send an email to me about this or report this problem here.


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