In a commentary Thursday, the state-run People's Daily defended the constitutional change as an "important move."
"This amendment does not mean changing the retirement system for party and national leaders, and does not mean a life-long term system for leading officials," it said.
The editorial comes after criticism both outside and inside China of the move, which comes after years of speculation Xi would seek to buck tradition and remain in power after his two five-year presidential terms were up.
"Removing term limits does not mean that Xi will necessarily stay in for a third term, but it is hard to see who would have the audacity to challenge Xi should he decide to stay on for a third term," Margaret Lewis, a professor of law and Chinese constitutional expert at Seton Hall University.
"In the current political climate, even a tacit challenge to Xi's power is fraught with risk."
The People's Daily commentary is the latest salvo in an intense propaganda and censorship campaign launched by the central government following Sunday's announcement.
Dropping constitutional term-limits was first reported by the English-language version of state news agency Xinhua, with a Chinese version released hours later. This was a break with tradition, with important reports almost always coming out first in Chinese.
Censors are also using a sophisticated new tool -- optical character recognition, or OCR -- to scan photos sent in popular messaging platform WeChat, pulling them if they contain "bad" words or phrases, according to a new report from the Sans Internet Storm Center.
"The biggest reason for all this is that the rise of China has reached a critical point where some Westerners cannot psychologically bear it any longer," the paper said. "They wish to see misfortune befall the country. Even if it might hurt their own interests, they are willing to see China crumble first."
In an open letter Monday to Beijing's delegates to the National People's Congress, the rubber-stamp parliament tasked with approving the constitutional changes later this month, respected Chinese journalist Li Datong urged them to vote against it.
"Removing term limitations on national leaders will subject us to the ridicule of the civilized nations of the world. It means moving backward into history, and planting the seed once again of chaos in China, causing untold damage."
People walk past a poster of Chinese President Xi Jinping beside a street in Beijing on February 26, 2018.
Before Sunday's announcement, it was widely expected Xi would remain technically in charge even if another person took the presidency.
His real power flows from his role as General Secretary of the Communist Party -- which does not have term limits -- and previous leaders have wielded serious power from behind the scenes, without official titles.
"It is a system designed to accord with the national condition and ensure long-term peace and stability for the party and the country," Thursday's commentary said.
There is an unwritten rule that senior Party official retire after age 68.
While Wang did step down, he has not retired from politics, retaining his seat in the national legislature. He is widely expected to be made vice president later this year, after that role also had its constitutional term limits removed.