The product has been developed by Li's company, Belgian company DNA Interactif Fashion and US firm [TC]2.
Li's company is displaying the system at the designer service center at Guangzhou Textile Exchange Park in the Guangdong provincial capital.
The system can be updated as data is accumulated, such as ages, personal preferences and features specific to a region, Li said, adding that the company plans to relocate the server to China.
The Guangdong Association of Garment and Garment Article Industry is working with Li's company to place the system in public venues, such as shopping centers, to collect data.
It hopes this will help to upgrade the garment manufacturing industry in Guangdong, which is the largest in the country.
Ye Yili, deputy secretary- general of the association, said the system will help consumers to buy clothes, and garment makers, including online tailor-made clothing providers, to improve their production.
Association President Liu Yueping said the garment market has become increasingly subdivided, with more varieties in smaller batches in greater demand.
Tailor-made production for the mass market, involving developments such as remote purchasing and do-it-yourself design, can only be realized through new technology, he said.
The "magic mirror" system can also help garment makers to reduce their huge stocks by allowing them to showcase older designs no longer available in stores, Li said.