Under Xi's attempt to shore up the legitimacy of the party-state, the constitution now has the party's leading role written into the document's main body, declaring the party's leadership as the "most fundamental feature of socialism with Chinese characteristics".
China's almost 3,000 law makers are set to vote on Sunday, on proposed changes to the constitution, which will allow President Xi Jinping to serve indefinitely.
Xi's 10-year term is supposed to end in 2023.
Aside from value judgments about a lack of rule of law in the Asian country, as well as the authoritarian nature of the Chinese regime, Xi's elevation as the most powerful ruler after Communist China's founder Mao Zedong will pose two risks.
The party loyalists who attend the annual session of parliament have said the decision is popular with ordinary Chinese people and asserted that China was lucky to have a leader of President Xi's calibre.
The official China Daily reiterated a point previously made by the party's People's Daily that the amendment did not "imply lifetime tenure for any leader".
Only two "no" votes were cast, with three abstentions, from nearly 3,000 delegates.
"It is an important measure to priorities the coordination between the party, the military and country, said Shen Chunyao, Chairman of the Commission for Legislative Affairs of the NPC Standing Committee". By putting his authority on every matter at the same time, Medeiros and Hirson said, Xi "is very vulnerable if he has one or many policy failures, and the knives are likely to come out quickly in such a scenario".
With the term limit gone, Xi can rule China until he retires, dies or is ousted.
In China, there was opposition to the change.
China has cracked down on online criticism of Xi's power play, even as shares of companies with "king" or "emperor" in their names surged after the amendment was unveiled.
"This is the urgent wish of the common people", Ju Xiuqin, a delegate from northeastern Heilongjiang province, told AFP, echoing party claims that the amendment had the unanimous support of "the masses".
Chinese officialdom says the expansion of Xi's power is driven by the need to ensure stability for the country, which faces huge economic, social and geopolitical challenges.