grains of sand on the beach are probably fewer.

I like your sense of humor,O-P!
Please teach me a techqinue about our forum operation:
how do you know there is a new reply for your thread,just like me to refresh the page regularly?
It is physical job^=^
I click the second line here;

Thanks,O-P.My meaning is some like the private message do,for example,
"you have 3 messages, 1 are new."
and I will know there is a new reply,but it is a little thing,just curiously.I talk about this because I know there are similar tools when I visit other websites in China,it is convenient!