成算在心

Explanation: Good mind already calculating how to deal with the approach. 　　Source: Song Kong Pingzhong, "added Yi Qiao Shi said," To build pontoon deposited Li, Matrimony said, 'River Bridge ... ... this cable to be free of Bamboo and Rock, burglary considered too hard. 'Deposited said' I into the operator in mind, there must be by the legislature. '"