Xinhua world news summary at 0030 GMT, July 21 Xinhua 21 Jul 2021, 11:05 GMT+10 MADRID -- The Spanish government opened on Tuesday its auction for the concessions for its 5G networks in the 700 megahertz (MHz) frequency in a move it expects to bring in 1.5 billion euros (1.76 billion U.S. dollars) in revenues. Telefonica, Orange and Vodafone are the only service providers that will take part in the bidding for concessions that will have a minimum duration of 20 years and will come with an optional 20-year extension. (Spain-technology-5G) ---- WASHINGTON -- A senior aide to U.S. House Speaker Nancy Pelosi and a White House official, both fully vaccinated, have tested positive for coronavirus after attending an event together, media reported on Tuesday.