First of all, it needs to be clear that academic norms require us to respect and protect other people's intellectual property rights and academic achievements, and we cannot directly copy or quote other people's research achievements, including master's thesis, without authorization or permission. If this happens, measures should be taken to solve the problem as soon as possible.

If the undergraduate thesis plagiarizes a part of the master thesis, it can be revised to meet academic norms and requirements. The specific modification method can be determined according to the specific situation, such as reorganizing and expressing the copied content, or adding new content to replace the copied content.