China's economic development prospects, as well as the marketcost of capital.
中国经济的发展前景，以及，市场的资金成本。
2
Overall, the portal AD delivery as long as the operation is good, not too low for the marketcost of the companies can be considered.
总体来说，在门户广告的投放只要操作的好，对于市场费用不是太低的公司都是可以考虑的。
3
The reason is: the vast majority of cases, and from time to time Application of Equal-string represented by the average marketcost of their own should be different.