Ursula von der Leyen, President-elect of the European Commission, arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday. (Photos: Xinhua)

Ursula von der Leyen, President-elect of the European Commission, arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Belgian Prime Minister and president-elect of the European Council Charles Michel arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

French President Emmanuel Macron arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Croatian Prime Minister Andrej Plenkovic arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Ursula Von Der Leyen, president-elect of the European Commission, arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

German Chancellor Angela Merkel arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Irish Prime Minister Leo Varadkar arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

European Parliament President David Sassoli arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Italian Prime Minister Giuseppe Conte arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Bulgarian Prime Minister Boyko Borissov arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Finland's Prime Minister Antti Rinne arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Swedish Prime Minister Stefan Lofven arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

French President Emmanuel Macron arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

French President Emmanuel Macron arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

German Chancellor Angela Merkel arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Jean-Claude Juncker, president of the European Commission, arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

Luxembourg's Prime Minister Xavier Bettel arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

French President Emmanuel Macron arrives for the EU summit in Brussels, Belgium, Oct. 17, 2019. The two-day summit kicked off on Thursday.

European Parliament President David Sassoli attends a press conference during an EU summit in Brussels, Belgium, on Oct. 17, 2019. The two-day summit kicked off on Thursday. The European Union (EU) and Britain have reached a new Brexit deal, Jean-Claude Juncker, President of the European Commission, said Thursday.

German Chancellor Angela Merkel attends a press conference during an EU summit in Brussels, Belgium, on Oct. 17, 2019. The two-day summit kicked off on Thursday. The European Union (EU) and Britain have reached a new Brexit deal, Jean-Claude Juncker, President of the European Commission, said Thursday.

German Chancellor Angela Merkel attends a press conference during an EU summit in Brussels, Belgium, on Oct. 17, 2019. The two-day summit kicked off on Thursday. The European Union (EU) and Britain have reached a new Brexit deal, Jean-Claude Juncker, President of the European Commission, said Thursday.

British Prime Minister Boris Johnson attends a press conference during an EU summit in Brussels, Belgium, on Oct. 17, 2019. The two-day summit kicked off on Thursday. The European Union (EU) and Britain have reached a new Brexit deal, Jean-Claude Juncker, President of the European Commission, said Thursday.

European Council President Donald Tusk attends a press conference during an EU summit in Brussels, Belgium, on Oct. 17, 2019. The two-day summit kicked off on Thursday. The European Union (EU) and Britain have reached a new Brexit deal, Jean-Claude Juncker, President of the European Commission, said Thursday.