BARCELONA, May 28-- China is considering enhancing actions against climate change, a Chinese official on climate change said on the sidelines of a three-day Carbon Expo 2015 held here until Thursday.

Wang Shu, a climate change official from China's National Development and Reform Commission, made the remarks while talking to Xinhua.

Wang, who took part in a workshop entitled "Domestic carbon pricing action: Progress and challenges in key emerging economies" here, said the Carbon Expo was a good opportunity for exchange.

He said China was "enhancing policies" to meet its targets, such as the issue of a low carbon technology list every year.

Kes Shotam, co-founder of Climate Resources Exchange in Singapore, told Xinhua that China had taken the lead when it came to Clean Development Mechanism (CDM) among developing countries. "I see it as a very good sign," he said.

"(China) is on the right track," Shotam said, adding that "we are very impressed with what China is doing in Asia."

In 2011, China appointed seven pilot sites, including two provinces and five cities, to establish a trans-provincial and trans-regional emissions trading system, Wang said.

China now expects to have the support to create a national ETS (emissions trading system) market. "We are bringing experts to help us create the national ETS," Wang said.

Asked about the carbon tax, Wang Shu said China "does not say no to carbon tax," but adding "we need to do a research carefully about the impact and rate." "We have established an ETS and we do not want to have a negative impact on our ETS," he clarified.

This year's Carbon Expo drew 100 exhibitors. Leading policy makers, NGOs, think tanks, business representatives and financial institutions gathered to discuss the situation of carbon markets.

The event, organized by International Emissions Trading Association, the World Bank, and Fira de Barcelona, is held six months before the United NationsClimate Change Conference in Paris later this year.