If I not scare of troublesome, I should just register the subject of project paper (which I already registered last sem) again in order to fulfil the minimum credit hour for registration. If I take action to do something (which I think is not necessary) , now I would have the chance to add and drop subject freely without being fined. Because I didn't click on any subject during the registration period, now SGS want to fine me for not registering any subjects. So damn innocent!!
By the way, this teaches me a lesson~better do something imperfectly than to do nothing flawlessly.
Next time I should do more (even think it is not necessary needed), better than do nothing.