What is the most affordable SMS package for cards?

SMS is still a new force with high cost performance, but mobile friends don't like to send messages. Overbearing sports! The new forces have 15 package, 150 package and 2 1 package with 400 packages in many places. It doesn't matter inside or outside the network, it can't be compared with mobile. I use a new power QQ card, and three packets of private messages in January are bound to a domestic Unicom number, which can be sent at will. Is it moving?