The survey also showed that more than two-thirds of Republicans and Democrats said they are "not at all confident" that elected officials will be able to work together to reduce healthcare costs.
The stronger, yet still moderate, consumer inflation remained below the government's annual target of around 3 percent set for 2017.
The system is set to be in place for all Chinese citizens and businesses by 2020.
The strong performance came amid a cooling property market as local governments toughened measures to rein in speculation, especially in major cities.
The summit concluded on Sunday.
The survey found that 62.9 percent of respondents would not eat at restaurants that are overcrowded.
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The summit, organized by the Shanghai government's Development Research Center, followed the unveiling of a delta region master plan by the central government on Sunday that is designed to boost the area's vitality.
The talks were first meant to be held in April and then in June but both were postponed, triggering speculation of a possible rift amid disputes over trade.
The survey of 64,000 respondents showed that almost half of them were worried about inconvenient charging, and over 30 percent said the battery cost would be exorbitant.
The supplement forecasts inflation of 2.8 percent in 2019 and 3.1 percent in 2020, up from the September prediction that prices would rise 2.7 percent this year and next year.