I plugged in my charger, and on my screen were Chinese letters.

I plugged in my charger and my lock screen was all Chinese letters/symbols. Once I unlock it, it works fine. Just feeling a little uneasy about it. Any suggestions?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 1
crwdns2934285:0crwdne2934285:0