When it comes to North Korea, there is always more questions than answers and the latest mystery involving the country’s answer to Spice Girls is no exception.

The Moranbong Band, an all-girl group whose members were personally selected by North Korean leader Kim Jong Un, abruptly canceled their three-day tour of China, only hours before the start of the first show on Dec. 12 and no one seems to know why.

Sporting short sequined dresses and fashionable hair styles that are a world apart from the usual fashion favored by North Korean women, the Moranbong singers’ repertoire is heavy on odes to Kim Jong Un’s greatness with stirring ultranationalist messages. That is where the trouble might have started.

One reason for the disappearing act, according to The Wall Street Journal, may be China’s expression of discomfort over the band’s focus on Kim Jong Un in their program. The U.K.’s Telegraph suggested that Kim had cut short the tour after learning that Chinese President Xi Jinping won’t be attending the concert.

Yet another speculation, this one by a South Korean media outlet, points to a prop used by the band which shows a video of an intercontinental ballistic missile launch in the background as the women are performing which China may have tried to censor.

Whatever the real reason for the cancellation of the tour. the band’s first overseas tour had been greeted with some excitement in China, an important market for South Korea’s K-pop.

Neither North Korea nor China have commented on the latest developments, although based on the coverage by North Korea’s official KNCA, the band is clearly a chart-buster at home.

“The citizens in the DPRK have praised the Moranbong Band, now on a friendship performance tour of China together with the State Merited Chorus, as an art troupe of national treasure for its peculiar artistic influence,” reported KCNA in an article published Dec. 11, the day before the band walked away from their big international debut.