你是我这辈手心里的宝你是我这生最美的风景
[nĭ shì wŏ zhè bèi shŏu xīn lĭ de băo nĭ shì wŏ zhè shēng zuì mĕi de fēng jĭng]
This is an admiring sentence that translates into English roughly like this: 'You are my most cherished treasure forever/for the rest of my life, you are the most beautiful scenery in my lifetime'. People may give themselves such a username if they hold others in high regard and cherish their memory with that person.