那都是梦
[nèi dōu shì mèng]
It can be translated into 'All of it was just a dream'. Perhaps this user feels disillusioned after something didn't go as planned. It represents the user’s disappointment or regret towards some unattainable things, emphasizing that those once cherished things turned out to be unreachable at last. Meanwhile, there might be some helplessness behind this net name.