The annual export-oriented Canton Trade Fair in southern China, the world's biggest sales event, was held online in June.
China's manufacturers are flexible, efficient global competitors, but its fledgling tourism, finance, health care and other service industries lag their Western counterparts. Regulatory barriers limit the ability of foreign banks and other providers to compete in China two decades after Beijing joined the free-trading World Trade Organization.
US officials who are waging a tariff war with Beijing over its trade record point to services, in which the United States runs a surplus with China, as a promising area.
Organizers say 18,000 companies and 100,000 people from 148 countries and regions signed up to take part in the trade fair, which runs through Wednesday.
China, where the pandemic began in December, was the first economy to shut down and the first to begin the struggle to revive business after the ruling party declared victory over the disease in March. Factories, office towers and shopping malls have reopened but visitors to public buildings in Beijing still are checked for fever by masked guards.
China became the first economy to return to growth with a 3.2% expansion over a year earlier in the three months ending in June, rebounding from the previous quarter's 6.8% contraction.
The trade fair has three-dimensional technology for foreign vendors to show goods and secure online communications to talk to customers, the director of the Beijing Municipal Bureau of Commerce, Yan Ligang, told reporters on Thursday.
Guests and staff must wear masks and will be checked throughout the day for fever, according to Yan. He said organizers will "restrict the flow" of people and the building will be tested for the virus and disinfected every day.
Some 200 medical, disease control and first aid staff will be on duty, Yan said.
Chinese companies plan to showcase possible coronavirus vaccines that are under development, according to the Beijing Health Commission. It said some will display tools that can detect the virus in 30 minutes.
Other planned exhibitions include cultural, financial and public health services, next-generation telecoms and service robots.
The coronavirus "cannot stop the development of service trade, nor can it stop our confidence and action to work together," Xi said.