在梦里的感觉亦幻亦真
[zài mèng lĭ de găn jué yì huàn yì zhēn]
It translates into 'The feeling in dreams is so lifelike but also illusory'. Here it refers to those experiences that give people ambiguous feelings, just like walking through a fog - everything feels real and fake at the same time. People who use such a user name may tend to be emotional and dreamy, enjoying their inner world.