The sedan's logo featured Chairman Mao Zedong's calligraphy and a red flag.
The six-day event held earlier this month in Beijing was the first major international economic and trade event held both online and offline by China since the COVID-19 outbreak.
The services trade refers to the sale and delivery of intangible products such as transportation, healthcare, product development, logistics, tourism and telecommunications.
The six-seat vehicle capable of Level 3 autonomous driving, features vehicle-to-everything communication and can run for 600 kilometers on one charge, the company said.
The sender can select the desired mailing address and send the corresponding code to the courier, who can begin mailing items after typing the code into the system.
The signing ceremony was held at the South Korean foreign ministry's headquarters in Seoul, with Chang Won-sam and Timothy Betts, top negotiators from both sides, in attendance.
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The services include delivery of exhibits, tracking of transportation, survey of the exhibition hall and training of the audience to observe the artwork in a proper way, to conduct risk assessment and control from the preparatory stage of the exhibition, he said.
The six-nation Northeast Asia region-China, Russia, Mongolia, the Democratic People's Republic of Korea, the Republic of Korea and Japan-represents a market with a population of 1.7 billion and more than 20 percent of the world's GDP, according to the expo's executive committee.
The screening and overhaul of urban safety hazards will be standardized by improving the mechanism for identifying, registering and supervising major sources of dangers, the guideline said.
The services sector has "big growth potential", which could be released through improving the quality of supply in many services sectors, according to Tang.