99 Bookstore 5th Anniversary Store Celebration: Books up to 9.9 yuan, Limited to 6 Days, Grab Quickly!

This 5th anniversary sale of the 99 Online Bookstore is definitely a great value, and it should be even more aggressive than the previous 49% discount price war between Joyo and Dangdang. I wonder how much cost 99 Bookstore will invest in this anniversary sale.