How does Mencius explain that there is no essential difference between Liang's immigration measures and "neighboring politics"? What kind of speaking skills are used here?

Liang Huiwang likes military struggle. When talking with Mencius, I talked about how he loved the people as a son and how he made great achievements. The original text is as follows: I am loyal to my country. If Hanoi is fierce, we will move the people to Hedong and the millet to Hanoi. Hedong is also fierce. If you look at the politics of neighboring countries, I have no intention at all. What can we do if the people of neighboring countries do not increase or decrease? Mencius said to him, "The king is belligerent. Please use the metaphor of war. Drum filling, weapon company, abandoned armor troops go, or stop at a hundred steps, or stop at fifty steps. What if the pot is too black?

Mencius compared Liang's politics with those of neighboring countries by contrast, and satirized Liang's belligerence with pot calling the kettle black's story. The most fundamental way to benefit the people is to reduce wars and let the people rest.