"Never forget, and there will always be echoes. We are your echoes." A fan connecting online said this on the evening of March 27 at THE9's immersive virtual concert "Virtual City". Before the concert, many fans, despite having purchased tickets, still had doubts about the concert's price, format and content.

This concert incurred a cost of over 100 million yuan. Leveraging XR technology and virtual production, it enabled "cross-temporal interaction" between fans and idols. This concert by THE9 is a trial for iQIYI in the field of intelligent production. Wu Lei, the executive producer of the concert, told reporters: "There are three core technological breakthroughs required for this concert live broadcast: first, the virtual technology itself; second, the ticketing system; third, user interaction. Only by ensuring content quality and user interactive experience can we unlock more room for commercial monetization in the future."

"This concert is a showcase, and iQIYI will make significant investments in virtual production in the future with a series of plans in place," introduced Yang Haitao, Vice President of iQIYI. In addition to concerts, virtual production technology may be applied to stage plays, film and television production and other fields in the future, and other related projects are currently under research and development.

At the opening of the concert, THE9 took an elevator shuttling between buildings to reach their own "Virtual City". The stage for Dumb Dumb Bomb was designed in the shape of a rising top; the background for Hunt was set in a primeval jungle where the performers rode a truck through the woods; Sphinx incorporated elements such as Egyptian pyramids and the Sphinx into the stage design... From the neon-blinking city to the pyramids deep in the desert, this concert brought fans an immersive "Virtual City" through modern technology.