"It can be used for video conferencing for 10 people on mobile phones and for 1,000 people." It cost nearly ten million yuan to invest in R&D and free use during the epidemic, making the meeting simpler. Just download and register the "Little Detong" APP, you can connect to the online video conference, each mobile phone can enjoy free 200 party while online, During the epidemic situation, many issues such as online meetings and meetings of the government, enterprises, institutions and individuals were resolved.