“Loyally seeing the skies here, bearing the duty of constructing a growing power,” the tune starts, in the most obvious reference to the watchdog’s part in keeping out unwanted foreign content. “In the ocean where all commitments meet, [we’re] the measurement of the Chinese culture … our belief and commitment will flow in the Yellow river as well as the Yangtze river.”

It continues: “A great web power – tell the world that increasing as a great power is the Chinese vision. A great web power – I ‘m representing the nation to the world.”

A helper affirmed that the tune was written by Wang in the invitation of officials but said he wouldn’t take part in an interview.

Based on China Radio International, the nation’s net tsar, Lu Wei, told the gala that China would securely safeguard its cyber sovereignty: “Only when every state performs its obligation well in managing cyberspace security can our common cyberspace be safer and much more consistent.

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The video appeared as the European Chamber of Commerce warned that China was being isolated by increased censorship from the remaining part of the planet and could turn its national networks into an intranet. In an unusually strong statement, following a survey of its own members, it said that company was being damaged by limitations and deterring investment and growth in China.

These measures are also deterring much-needed foreign gift from relocating here. Limited accessibility to essential web tools isn’t just an unfortunate annoyance for people, it’s an increasingly onerous expense of doing business here that many businesses are finding more difficult to endure.”

He included: “We understand from extensive dialogues with the Chinese people as well as the private sector that lots of national firms are equally as frustrated as our members.”

China has had one of the world’s most extensive and innovative internet censorship systems, blocking international services including Twitter, Facebook, Google and YouTube and scrubbing national services of any sensitive content, along with sites like that of the New York Times.

But it’s cracked down farther in recent weeks, targeting virtual private networks (VPN), used by a lot of individuals to get access to content abroad. It’s also renewed its drive for real-name registration on national services and deleted WeChat reports that were “disseminating twisted versions of history”.

Chinese officials claim that other nations also have limitations online. Nevertheless, China’s are wide-ranging: there are not any clear standards for what constitutes unacceptable stuff, authorities don’t support which websites have been blocked or censored, and there isn’t any mechanism for challenging choices.