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Analysts said PetroChina's increased natural gas output still lags behind the country's gas demand growth, as the government steps up efforts to promote the fuel to tackle severe air pollution. S&P Global Platts Analytics forecast that China will increasingly replace coal with cleaner burning gas to reduce air pollution.

An online trademark service system has been launched as part of efforts to better protect intellectual property rights, the National Intellectual Property Administration announced on Nov 27.

And banks' strength lies in their experience in the financial business and the massive data on customers, trading and markets collected since the 1990s, he said.

And thirdly, social engagement, such as travel, going to shows and concerts and socializing with family and friends.

And despite the effort, the figure was 0.7 of a percentage point higher than the same month last year.