![Tents fill the camping area at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)](http://www.ecns.cn/hd/2019/02/14/660552ae04b34b0ca708103c06c10516.jpg)
Tents fill the camping area at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)
![Tents fill the camping area at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)](http://www.ecns.cn/hd/2019/02/14/89fbc93e63c847e59e0533a6cdc0d23c.jpg)
Tents fill the camping area at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)
![Participants play games at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)](http://www.ecns.cn/hd/2019/02/14/b7193ece5aa64081b2f204700cf64190.jpg)
Participants play games at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)
![Participants play games at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)](http://www.ecns.cn/hd/2019/02/14/9ad7856a81a947f79f292abe61e227ad.jpg)
Participants play games at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)
![Participants play games at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)](http://www.ecns.cn/hd/2019/02/14/2c2fce143854495a8529f0032199d8a2.jpg)
Participants play games at the Campus Party technology festival, in Sao Paulo, Brazil, Feb. 12, 2019. Campus Party is an annual week-long, 24-hour technology festival that gathers developers, gamers and computer enthusiasts. (Photo/Agencies)