"The voice from inside the EU shows that the law is really not convincing," Chai Haibo, deputy secretary-general of the China Air Transport Association, told China Daily on Monday.
"Now it's time for the EU to reconsider the law's legitimacy."
The ETS will place a heavy burden on Chinese airlines.
China's aviation industry will have to pay about 800 million yuan ($126 million) in extra costs annually for the system, according to current standards and this will reach 18 billion yuan annually in 2030, according to Li Jiaxiang, minister of the Civil Aviation Administration of China.
Frank Puettmann, a spokesperson for Lufthansa, told China Daily that the impact of the current ETS on Lufthansa would be very strong. "Judging by the average trend in certificate prices, Lufthansa expects to incur additional expenses of 130 million euros ($171 million) in 2012," he said.
Civil aviation authorities in many countries, as well as governments, have also expressed objections to the ETS.
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Xin Dingding and Zhao Shengnan in Beijing contributed to this story.
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