The earliest Chinese reference to channels is in the Mawangdui Medical Manuscripts, which are dated to the Warring States period of the Zhou Dynasty (475 BC-221 AD). The text presents 11 channels.
There are no acupuncture points listed in those channels. The treatment methods are moxibustion and bloodletting; since there were no points, there is no acupuncture.
Read the whole article in Acupuncture Today here: http://www.acupuncturetoday.com/mpacms/at/column.php?c_id=294
Part 1 can be found here: http://www.acupuncturetoday.com/mpacms/at/article.php?id=33297