He said the China Banking and Insurance Regulatory Commission will publish detailed implementation measures as soon as possible.
He was expelled from the Party and removed his post in August.
He said the Chinese economy has been growing and progress is good for everyone who has confidence in China's commitment to the world economy.
He was joined by Paul Chan Mo-po, financial secretary of the Hong Kong SAR. Chan expressed hope that the people of Hong Kong would stop the wrangling, which he said leads to polarization.
He said the pay gap between white British workers and lower-paid ethnic groups narrowed when weighted to reflect people's educations and career choices.
He stressed the media's role as a watchdog against science fraud and misconduct.
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He said the summit represents the success of win-win cooperation between different civilizations. The deepening China-Africa trade partnership will economically benefit both sides, and help safeguard and consolidate the rule-based international trade system with the World Trade Organization at its core, He added.
He said the two countries should help the G20 Summit send a strong signal against anti-globalization trends, despite more difficult circumstances this year.
He said the law does not contravene that principle.
He warned that a conflict between the US and China would be "catastrophic" for the international community and humanity.