Contact Andrew Yu

There are many ways to contact me. None of these require proprietary software.

Please do not contact me via WeChat.

I do not use popular social media like Twitter or Weibo.


If you have no idea what these mean, read the Email Self Defense tutorial.

Usually, electronic mail that I send are signed with my OpenPGP key. Please use OpenPGP when contacting me through electronic mail. The following are available.

In order to verify the authenticity of the key, check if you've actually downloaded these keys from, and also check the fingerprints with me elsewhere (email, IRC, in real life, etc) before trusting or signing it.

Once confirmed, please sign and share my key in order to build the OpenPGP Web of Trust.