During the reign of Dazhong Xiangfu, Emperor Zhenzong of the Song Dynasty, a fire broke out in the palace, and Ding Wei was in charge of the restoration project at that time. When repairing the palace, the place where the migrant workers went to collect soil was far away, so Ding

During the reign of Emperor Zhenzong of Song Dynasty , a fire broke out in the palace, and Ding Wei was in charge of the restoration project at that time. When repairing the palace, the place where the migrant workers went to collect soil was far away, so Ding Wei asked them to dig a road to collect soil. Within a few days, the road was dug into a large trench. So, he caused the Bian River to burst and led the river water into the trench. In this way, the bamboo wood sent from various places was woven into bamboo rafts and cut, and together with various building materials transported by ship, they were all transported into the palace through this ditch. After the repair project was completed, he asked people to fill the ditch with the demolished broken bricks and ash from the fire, and rebuild it into a road. In this way, three birds with one stone were achieved - firstly, the road was dug, which solved the difficulty of obtaining soil; secondly, ditches were formed to solve the problem of transporting building materials; thirdly, the road was repaired, which solved the problem of stacking of waste such as broken bricks and tiles. The cost savings from this are estimated to be in the hundreds of millions.

【Abu Wu Dao】This strategy was first seen in the "Book of Sui Dynasty·Changsun Sheng Biography". The book records that during the Southern and Northern Dynasties period Northern Zhou there was a military commander Changsun Sheng who was particularly good at shooting. Once he saw two eagles fighting for a piece of meat, so he shot an arrow at them, and the two big eagles fell down together. Later generations summarized it as "killing two birds with one stone", which is a metaphor for taking one measure and getting two benefits, or doing one thing and getting two effects. Killing two birds with one stone, also known as killing two birds with one stone, is to point out a move to knock down two or more enemies. It is not simple or easy to use this strategy, because you are facing several opponents, and if you are not careful, you will cause trouble. Therefore, before and after the incident, don't expose yourself, let alone act too hastily, otherwise it will be out of control.