As for the other arrests, a 31-year-old man was arrested on April 7 at Cheung's show in Nanchang, in Jiangxi province, for economic crimes. And, on May 5 and May 20, two suspects were arrested at Cheung's concerts in Zhangzhou, in Fujian province and in Jiaxing, in Zhejiang province.

In another development, the police in Luoyang, in Henan province, where Cheung plans to hold a concert on July 8, have written on their Sina Weibo account to say: "Jacky Cheung, we are ready!" responding to the reports of the arrests at other venues.

Cheung, 55, who is known as one of Hong Kong's "Four Heavenly Kings", is currently touring various cities in China as part of his A Classic Tour, which started in October 2016.

One of the best-selling singers of all time in Asia, Cheung has sold more than 60 million albums worldwide, and has also appeared in dozens of films that have been well received both by audiences and critics.

According to Universal Music, Cheung has so far done 147 shows as part of the A Classic Tour schedule, which betters the Jacky Cheung 1/2 Century Tour, which had 146 shows.

And more than 3 million people have attended shows on this tour, which has covered more than 70 Chinese cities.