Is it really necessary to print a ticket?

[杜宏羽]

hi，just need u name or email address.
2014年5月23日 下午8:27于 "Idbl" <idbl at openmailbox.org>写道：

> I've registered online, and the page said that I needed to print the
> emailed ticket. However, I don't have a printer. Is it enough to copy
> down the number that is printed along the side of the bar code? It
> strikes me as superfluous to require one to bring printed copies of
> tickets when the event is free to attend.
>
> Anyone involved in organizing have any information about this?
>
> Thanks :)
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