The Changjiang EV model is displayed during a media preview of the Auto China 2018 motor show in Beijing, China April 25, 2018. REUTERS/Damir Sagolj

A visitor takes pictures of the Changjiang EV model displayed during a media preview of the Auto China 2018 motor show in Beijing, China April 25, 2018. REUTERS/Damir Sagolj

U.S. Health and Human Services Secretary Michael Leavitt (L) and China's Minister of the General Administration of Quality Supervision, Inspection and Quarantine Li Changjiang sign a progress report between their two countries on the safety of food and feed during the Strategic Economic Dialogue at the U.S. Naval Academy in Annapolis, Maryland June 18, 2008. REUTERS/Jonathan Ernst (UNITED STATES)

(L-R) U.S. food and drug Chief Susan Winckler, Minister AQSIQ China, Li Changjiang, Assistant Director-General WHO Susanne Weber-Mosdorf, Chinese Vice Premier Wu Yi, European Union Trade Commissioner Peter Mandelson, Chinese Minister of Health Chen Zhu and Director-General of FAO Yasuo Endo attend an international food safety forum in Beijing November 26, 2007. Mandelson told China on Monday its reputation was at risk after a series of product safety scandals and that it must do more to tackle the problem. REUTERS/Oded Balilty/Pool (CHINA)

Leaders from the Association of South East Asian Nations' applaud as China's Director of General Administration of Quality Supervision, Inspection and Quarantine Li Changjiang (front L) and Association of South East Asian Nations' Secretary-General Ong Keng Yong (front R) shake hands after the signing ceremony of the 11th ASEAN-China Summit, witnessed by leaders of the ASEAN countries, during the 13th ASEAN Summit in Singapore November 20, 2007. REUTERS/Bazuki Muhammad (SINGAPORE)

A vendor hands barbequed meat to customers at a food stall in Beijing November 2, 2007. The Chinese government approved in principle on Wednesday a new food safety law aimed at raising standards at every level of production, a senior official said. "This law totally covers how to standardise our food products, production, processing, sale and supervision," China's product quality watchdog chief Li Changjiang told reporters. REUTERS/Claro Cortes IV (CHINA)

A vendor waits for customers at food stall in Beijing November 2, 2007. The Chinese government approved in principle on Wednesday a new food safety law aimed at raising standards at every level of production, a senior official said. "This law totally covers how to standardise our food products, production, processing, sale and supervision," China's product quality watchdog chief Li Changjiang told reporters. REUTERS/Claro Cortes IV (CHINA)

A man buys lunch at a food stall in Beijing November 2, 2007. The Chinese government approved in principle on Wednesday a new food safety law aimed at raising standards at every level of production, a senior official said. "This law totally covers how to standardise our food products, production, processing, sale and supervision," China's product quality watchdog chief Li Changjiang told reporters. REUTERS/Claro Cortes IV (CHINA)

Vendors prepare pork sandwiches at a food stall in Beijing November 2, 2007. The Chinese government approved in principle on Wednesday a new food safety law aimed at raising standards at every level of production, a senior official said. "This law totally covers how to standardise our food products, production, processing, sale and supervision," China's product quality watchdog chief Li Changjiang told reporters. REUTERS/Claro Cortes IV (CHINA)

A vendor covers the steamed buns that she is selling at a food stall in Beijing November 2, 2007. The Chinese government approved in principle on Wednesday a new food safety law aimed at raising standards at every level of production, a senior official said. "This law totally covers how to standardise our food products, production, processing, sale and supervision," China's product quality watchdog chief Li Changjiang told reporters. REUTERS/Claro Cortes IV (CHINA)

Head of the World Health Organisation (WHO) Margaret Chan (R) shakes hands with Li Changjiang (C), Head of China's Product Quality Watchdog, before their meeting in Beijing October 31, 2007. Li announced that the Chinese government on Wednesday has approved in principle a new food safety law that he claims will raise standards at every level of food production. The law comes after international scrutiny about the quality of Chinese goods following scandals involving products ranging from toothpaste and pet foods to toys and fish. REUTERS/David Gray (CHINA)

Head of the World Health Organisation (WHO) Margaret Chan (L) sits beside Li Changjiang, Head of China's Product Quality Watchdog, during their meeting in Beijing October 31, 2007. Li announced that the Chinese government on Wednesday has approved in principle a new food safety law that he claims will raise standards at every level of food production. The law comes after international scrutiny about the quality of Chinese goods following scandals involving products ranging from toothpaste and pet foods to toys and fish. REUTERS/David Gray (CHINA)

Head of the World Health Organisation (WHO) Margaret Chan (C) is shown a video display of a Chinese factory by Li Changjiang (L), Head of China's Product Quality Watchdog in Beijing October 31, 2007. Li announced that the Chinese government on Wednesday has approved in principle a new food safety law that he claims will raise standards at every level of food production. The law comes after international scrutiny about the quality of Chinese goods following scandals involving products ranging from toothpaste and pet foods to toys and fish. REUTERS/David Gray (CHINA)

Li Changjiang, minister of China's General Administration of Quality Supervision, Inspection and Quarantine, waits for the arrival of European Union (EU) Consumer Protection Commissioner Meglena Kuneva (not pictured) in Beijing July 23, 2007. The EU wants China to crack down on more makers of faulty and dangerous goods, Kuneva said on Sunday at the start of a visit to press the trade giant to better regulate manufacturers. Kuneva's visit comes as worry about defective Chinese goods sweeps the United States and is threatening to spread in Europe. REUTERS/Elizabeth Dalziel/Pool (CHINA)

Li Changjiang, minister of China's General Administration of Quality Supervision, Inspection and Quarantine (C), speaks to the media after meeting with European Union (EU) Consumer Protection Commissioner Meglena Kuneva (not pictured) in Beijing July 23, 2007. The EU wants China to crack down on more makers of faulty and dangerous goods, Kuneva said on Sunday at the start of a visit to press the trade giant to better regulate manufacturers. Kuneva's visit comes as worry about defective Chinese goods sweeps the United States and is threatening to spread in Europe. REUTERS/Elizabeth Dalziel/Pool (CHINA)

Li Changjiang, minister of China's General Administration of Quality Supervision, Inspection and Quarantine (L), listens to European Union (EU) Consumer Protection Commissioner Meglena Kuneva (not pictured) in Beijing July 23, 2007. The EU wants China to crack down on more makers of faulty and dangerous goods, Kuneva said on Sunday at the start of a visit to press the trade giant to better regulate manufacturers. Kuneva's visit comes as worry about defective Chinese goods sweeps the United States and is threatening to spread in Europe. REUTERS/Elizabeth Dalziel/Pool (CHINA)

Li Changjiang, minister of China's General Administration of Quality Supervision, Inspection and Quarantine, listens to European Union (EU) Consumer Protection Commissioner Meglena Kuneva (not pictured) in Beijing July 23, 2007. The EU wants China to crack down on more makers of faulty and dangerous goods, Kuneva said on Sunday at the start of a visit to press the trade giant to better regulate manufacturers. Kuneva's visit comes as worry about defective Chinese goods sweeps the United States and is threatening to spread in Europe. REUTERS/Elizabeth Dalziel/Pool (CHINA)

Li Changjiang, minister of China's General Administration of Quality Supervision, Inspection and Quarantine, speaks to European Union (EU) Consumer Protection Commissioner Meglena Kuneva (not pictured) in Beijing July 23, 2007. The EU wants China to crack down on more makers of faulty and dangerous goods, Kuneva said on Sunday at the start of a visit to press the trade giant to better regulate manufacturers. Kuneva's visit comes as worry about defective Chinese goods sweeps the United States and is threatening to spread in Europe. REUTERS/Elizabeth Dalziel/Pool (CHINA)

European Union (EU) Consumer Protection Commissioner Meglena Kuneva listens to Minister of China's General Administration of Quality Supervision, Inspection and Quarantine Li Changjiang (not pictured) in Beijing July 23, 2007. The EU wants China to crack down on more makers of faulty and dangerous goods, Kuneva said on Sunday at the start of a visit to press the trade giant to better regulate manufacturers. Kuneva's visit comes as worry about defective Chinese goods sweeps the United States and is threatening to spread in Europe. REUTERS/Elizabeth Dalziel/Pool (CHINA)

European Union (EU) Consumer Protection Commissioner Meglena Kuneva (C) shakes hands with Minister of China's General Administration of Quality Supervision, Inspection and Quarantine Li Changjiang (L) in Beijing July 23, 2007. The EU wants China to crack down on more makers of faulty and dangerous goods, Kuneva said on Sunday at the start of a visit to press the trade giant to better regulate manufacturers. Kuneva's visit comes as worry about defective Chinese goods sweeps the United States and is threatening to spread in Europe. REUTERS/Elizabeth Dalziel/Pool (CHINA)

European Union (EU) Consumer Protection Commissioner Meglena Kuneva (L) listens to Minister of China's General Administration of Quality Supervision, Inspection and Quarantine Li Changjiang (R) in Beijing July 23, 2007. The EU wants China to crack down on more makers of faulty and dangerous goods, Kuneva said on Sunday at the start of a visit to press the trade giant to better regulate manufacturers. Kuneva's visit comes as worry about defective Chinese goods sweeps the United States and is threatening to spread in Europe. REUTERS/Elizabeth Dalziel/Pool (CHINA)

China's Minister of the General Administration of Quality Supervision, Inspection and Quarantine Li Changjiang (L) and Singapore's Minister for Health Khaw Boon Wan (front R) sign a Memorandum of Understanding on border health measures in Singapore July 11, 2007. China's Vice Premier Wu Yi (2nd L), Singapore's Deputy Prime Minister and Minister for Home Affairs Wong Kan Seng (C) and Singapore's Minister for Trade and Industry Lim Hng Kiang observe the ceremony. REUTERS/Nicky Loh (SINGAPORE)

A general view of the polluted river bank at a section of the Changjiang River in Wuhu, east China's Anhui province January 13, 2007. Excess waste discharge and land reclamation are worsening pollution in China's shallow coastal waters, China Daily reported on Saturday. REUTERS/Jianan Yu (CHINA)