The creation and operation of smart contracts consume CPU. A smart contract takes time to run on a virtual machine, and the time consumed is calculated by microseconds. CPU resource will be consumed in the form of Energy, meaning 1 Energy = 1 microsecond. If a contract needs 100 microseconds to execute on a virtual machine, it will burn 100 Energy. The total CPU resource volume provided by the TRON network within 24 hours is 50,000,000,000 Energy.