Unlike some Chinese ministerial officials who shun reporters, the open-minded Sun also gave more chances for reporters at the scene.

He took questions on Bo, saying that the case is under judiciary procedures.

Less than four months since he was appointed head of Chongqing, Sun said he visited 25 districts and counties under the jurisdiction of the municipality, having talks with local leaders, and has found that Chongqing "has bright prospects" but still remains an underdeveloped region.

In the year since the Bo Xilai scandal shocked the city, Chongqing's economy has grown 13.6 percent, making it one of the fastest growing regions on the mainland. It also maintains quickly growing foreign trade despite the nation's overall foreign trade difficulties.

Yet the fact that its foreign direct investment in 2012 saw no growth - compared with 57 percent annual growth since 2007 - also reflects the impact of the Bo Xilai scandal.

The per capita income of its residents is still lower than the national average, and Sun said people in Chongqing want to improve their standard of living.

Chongqing Mayor Huang Qifan, who also attended the Wednesday panel discussion, said Chongqing still boasts the advantages of having enough labor resources and advantages brought by reforming policies to drive its economy.

Huang said earlier that the Bo and Wang Lijun cases stalled investment, and caused foreign and domestic investors to hesitate about putting their money into the city earlier in the year.

Huang also said at the panel discussion that Chongqing aims to lift the frequency of trains on the more than 11,000-km Chongqing-Xinjiang-Europe International Railway, a logistics route between Asia and Europe honored as "the modern silk road".

Operating since 2011, the railway starts in Chongqing, travels through Russia, Belarus and Poland before arriving in Duisburg, Germany.

The whole journey takes an average of 16 days, and all customs and tariff procedures have been simplified to make international trade more convenient.

While the train operated only once a month in 2011, it will now run every day, said Huang.

The number of departures is expected to reach three times a day by 2015, said Huang, adding that he also hopes the train can bring more commodities on its way back from Europe.

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