U.S. Soybean Export Council official Zhang Xiaoping is interviewed by an NBC television crew during a tour by a Chinese trade delegation by a soybean filed near Norborne, Missouri, U.S., August 28, 2018. Picture taken August 28, 2018. REUTERS/Dave Kaup

Gold medallist Zhang Xiaoping of China kisses the medal during medal ceremony after the light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Ceerwan Aziz (CHINA)

Silver medallist Kenny Egan (C) of Ireland kisses the medal of gold medallist Zhang Xiaoping of China during medal ceremony after the light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Ceerwan Aziz (CHINA)

Silver medallist Kenny Egan (L) of Ireland kisses the medal of gold medallist Zhang Xiaoping of China during medal ceremony after the light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Silver medallist Kenny Egan of Ireland, gold medallist Zhang Xiaoping of China and bronze medallists Yerkebulan Shynaliyev of Kazakhstan and Tony Jeffries of Britain (L-R) pose during medal ceremony after the light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Ceerwan Aziz (CHINA)

Silver medallist Kenny Egan of Ireland, gold medallist Zhang Xiaoping of China and bronze medallists Yerkebulan Shynaliyev of Kazakhstan and Tony Jeffries of Britain (L-R) pose during medal ceremony after the light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Marcos Brindicci (CHINA)

Silver medallist Kenny Egan of Ireland, gold medallist Zhang Xiaoping of China and bronze medallists Yerkebulan Shynaliyev of Kazakhstan and Tony Jeffries of Britain (L-R) pose during medal ceremony after the light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Marcos Brindicci (CHINA)

Silver medallist Kenny Egan of Ireland, gold medallist Zhang Xiaoping of China and bronze medallists Yerkebulan Shynaliyev of Kazakhstan and Tony Jeffries of Britain (L-R) pose during medal ceremony after the light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (L) of China punches Kenny Egan of Ireland during their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (L) of China punches Kenny Egan of Ireland during their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Marcos Brindicci (CHINA)

Zhang Xiaoping of China poses to photographers as he celebrates after defeating Kenny Egan of Ireland in their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Ceerwan Aziz (CHINA)

Supporters of Zhang Xiaoping of China cheer as he fights Kenny Egan of Ireland in their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (R) of China celebrates after defeating Kenny Egan of Ireland in their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping of China celebrates after defeating Kenny Egan of Ireland in their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Marcos Brindicci (CHINA)

Zhang Xiaoping (L) of China and Kenny Egan of Ireland bow after their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Kenny Egan of Ireland reacts after losing to Zhang Xiaoping of China in their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Kenny Egan of Ireland reacts during his fight against Zhang Xiaoping of China in their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (L) of China fights Kenny Egan of Ireland during their light heavyweight (81kg) final boxing match at the Beijing 2008 Olympic Games, August 24, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (L) of China fights Yerkebulan Shynaliyev of Kazakhstan during their men's light heavyweight (81kg) semi-final boxing match at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Marcos Brindicci (CHINA)

Zhang Xiaoping (L) of China fights Yerkebulan Shynaliyev of Kazakhstan during their men's light heavyweight (81kg) semi-final boxing match at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Marcos Brindicci (CHINA)

The referee declares Zhang Xiaoping (L) of China the winner in his men's light heavyweight (81kg) semi-final boxing match against Yerkebulan Shynaliyev of Kazakhstan at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (R) of China fights Yerkebulan Shynaliyev of Kazakhstan during their men's light heavyweight (81kg) semi-final boxing match at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (R) of China fights Yerkebulan Shynaliyev of Kazakhstan during their men's light heavyweight (81kg) semi-final boxing match at the Beijing 2008 Olympic Games August 22, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (L) of China fights Abdelhafid Benchabla of Algeria during the men's light heavyweight (81kg) quarterfinal 3 boxing match at the Beijing 2008 Olympic Games August 19, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping of China celebrates his win against Abdelhafid Benchabla of Algeria in the men's light heavyweight (81kg) quarterfinal 3 boxing match at the Beijing 2008 Olympic Games August 19, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (L) of China fights Abdelhafid Benchabla of Algeria during the men's light heavyweight (81kg) quarterfinal 3 boxing match at the Beijing 2008 Olympic Games August 19, 2008. REUTERS/Nir Elias (CHINA)

Abdelhafid Benchabla of Algeria reacts after losing to Zhang Xiaoping of China in the men's light heavyweight (81kg) quarterfinal 3 boxing match at the Beijing 2008 Olympic Games August 19, 2008. REUTERS/Nir Elias (CHINA)

Zhang Xiaoping (L) of China fights Abdelhafid Benchabla of Algeria during the men's light heavyweight (81kg) quarterfinal 3 boxing match at the Beijing 2008 Olympic Games August 19, 2008. REUTERS/Nir Elias (CHINA)

Zhang Xiaoping (R) of China fights Abdelhafid Benchabla of Algeria during the men's light heavyweight (81kg) quarterfinal 3 boxing match at the Beijing 2008 Olympic Games August 19, 2008. REUTERS/Nir Elias (CHINA)

Zhang Xiaoping (R) of China celebrates as Artur Beterbiev (L) of Russia reacts after their men's light heavyweight (81kg) round of 16 boxing match at the Beijing 2008 Olympic Games August 14, 2008. REUTERS/Lee Jae-Won (CHINA)

Artur Beterbiev of Russia fights Zhang Xiaoping (L) of China during during their men's light heavyweight (81kg) round of 16 boxing match at the Beijing 2008 Olympic Games August 14, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping of China celebrates after his fight against Artur Beterbiev of Russia in their men's light heavyweight (81kg) round of 16 boxing match at the Beijing 2008 Olympic Games August 14, 2008. REUTERS/Lee Jae-Won (CHINA)

Artur Beterbiev of Russia fights Zhang Xiaoping (L) of China during during their men's light heavyweight (81kg) round of 16 boxing match at the Beijing 2008 Olympic Games August 14, 2008. REUTERS/Lee Jae-Won (CHINA)

Artur Beterbiev of Russia fights Zhang Xiaoping (L) of China during during their men's light heavyweight (81kg) round of 16 boxing match at the Beijing 2008 Olympic Games August 14, 2008. REUTERS/Lee Jae-Won (CHINA)

Artur Beterbiev of Russia punches Zhang Xiaoping (L) of China during during their men's light heavyweight (81kg) round of 16 boxing match at the Beijing 2008 Olympic Games August 14, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (R) of China touches the ground during his fight against Artur Beterbiev of Russia in their men's light heavyweight (81kg) round of 16 boxing match at the Beijing 2008 Olympic Games August 14, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Xiaoping (R) of China fights Mourad Sahraoui of Tunisia during their men's Light Heavyweight (81kg) Round of 32 boxing match at the Beijing 2008 Olympic Games August 9, 2008. REUTERS/Lee Jae-Won (CHINA)

China?s Zhang Xiaoping (R) fights Tunisia?s Mourad Sahraoui during their men's Light Heavyweight (81kg) Round of 32 boxing match at the Beijing 2008 Olympic Games August 9, 2008. REUTERS/Lee Jae-Won (CHINA)

Zhang Shou Xiang (R), creator of the larger-than-life wax figure of China's paramount leader Deng Xiaoping (L) makes an adjustsment to the model's hair during a visit to the Forbidden City where Deng shares an exhibit with four of China's great departed heroes. Zhang made about 20 models of Deng before settling on the one on display, relying on photographs for likeness, since he was unable to gain access to the model himself. Picture taken 06JAN96