Chinese hackers with MSN Messenger

Recently there are so many contacts with me from Chinese speakers. Furthermore according to their chinese characters, they seems to come from the mainland of China, not from Taiwan/Hong Kong.

猫的生活 の発言:
　誰？
爱情褪色后 记忆开始 の発言:
　XXXX（my MSN ID is showing here),如果忙碌的你有时也想庸懒的品味一下阳光， 蓝天，记得和我一起…… http://liting.xunway.com
猫的生活 の発言:
　ha？
爱情褪色后 记忆开始 の発言:
　很高兴认识你~
猫的生活 の発言:
　你在哪裡?
爱情褪色后 记忆开始 の発言:
　有事走开,回头聊

In the above conversation, 「猫的生活の発言」 is my message. The red message is contacter's.

I don't especially show my MSN ID openly to the net. But such odd contracters definetely contact with me making use of SAME phrase. Perhaps I can easily guess that they choose me at random in MSN by personal query and send the above message as a manual which are written in hacking sites. After their last message, they keep silent certainly. That's mysterious. Even if I send a message to them such as "去死吧!", they reply to me nothing.

Who knows this hacking method? What do they want to do at all?