Not necessarily. Algorithm paper can be the analysis, comparison, optimization or improvement of existing algorithms, and it can also be the proposal of solutions to new problems. Innovation and improvement are important ways to contribute, but not the only way. In the research of algorithm, it is important to solve practical problems and improve the efficiency and accuracy of the algorithm, not just to innovate. Therefore, the algorithm paper should focus on solving practical problems and the practicability of the algorithm, not just innovation.