Guaido, 35, has appealed to military leaders to switch allegiance to him and let the aid through.
Great Wall shares rose 2.87 percent to close at 13.25 yuan (.98) in the A-share market, while in Hong Kong they closed at $HK10.08 (.28), a 1.61 percent rise.
Greenberg, one of 10 foreigners awarded the China Reform Friendship Medal by President Xi Jinping last year, said trade talks between the Chinese and US governments were "going forward quite well".
Great Wall Motors also delivered 6,070 vehicles under its high-end SUV marque Wey, up almost double figures from March. Its electric cars and pickups saw decent sales as well.
Guangdong has the country's largest local economy. Its GDP exceeded 7 trillion yuan (.02 trillion) in the first three quarters of this year and could top 9 trillion yuan for the year - about the same as the GDP of Spain, which ranked 14th globally last year.
Government to remove temporary controls imposed on businesses
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Graz’s No.34 E line is currently set up with the Chinese electronic buses, running 3.5 km for the whole route, 24 hours a day.
Guangdong province, in the spotlight since China released its outline development plan for the Guangdong-Hong Kong-Macao Greater Bay Area on Feb 18, sent a strong delegation to the forum to elaborate on the comprehensive blueprint for the area's strategic role, development goals and spatial layout.
Guangdong products on display included drones for photographers, smart household appliances, traditional paintings, iced tea and some intangible cultural heritage items.
Gross value added that measures the sectoral contribution to the economy totalled 5.45 billion patacas (6 million), up by 11.9 percent year-on-year.