Nearly one out of every nine NPC deputies declined to support the upgrading of Chongqing to become China's fourth municipality.
The number of abstentions and votes against the proposal came in contrast to a recent claims by Sichuan's top officials that the upgrading of Chongqing would accelerate the development of the central west region.
Of 2,720 deputies at yesterday's closing ceremony in Beijing, 2,403 voted in favour of the plan, with 148 against, 133 abstentions and 36 non-votes.
It meant more than 11 per cent, or one in every nine deputies, chose not to support the proposal even though ratification was assured.
The approval gave Chongqing the autonomy to handle its affairs and finances without recourse to Sichuan's provincial authorities. It would also see the southwestern city become the largest municipality, with a population of about 30 million.
But concern had been voiced by people in Sichuan that Chongqing, as a municipality, would compete with the provincial capital, Chengdu, in securing investments.