Chinese netizens have given a warm welcome to Prof Stephen Hawking after he joined microblog network Sina Weibo.

The British astrophysicist amassed two million followers within hours of launching his account on Tuesday.

His first message was a greeting to his "friends in China" posted in both English and Chinese.

Some Weibo users were comparing the experience of interacting with Prof Hawking online to making contact with the universe.

More than 230 million people use Sina Weibo, China's biggest social media platform, every month.

A growing number of international figures who have joined Weibo in recent years to connect to a Chinese audience.

'Gently touching the universe'

Prof Hawking's second post, on Wednesday, described the interstellar project Breakthrough Starshot which he is backing, saying it was "exciting to be involved in such an ambitious project".

Both posts were quickly flooded with excited comments expressing admiration and awe.

One wrote: "I'm writing this comment, even though you probably won't read it and understand it, so that it will at least flash on your phone for a second... This fragile connection is like using my fingers to gently touch the universe."

Others urged fellow netizens to be on their best behaviour around him.

"I hope there won't be any idiots who ask the professor brainless questions, please do not take him as a joke, and do not shame us Chinese people," said a commenter.

Still others peppered him with questions on the existence of aliens and quantum physics.

Prof Hawking has enjoyed a substantial following in China, with a Xinhua article on his last visit in 2006 noting he has "a cult status among Chinese youngsters much like that of Tom Cruise".

"The appeal of Hawking largely comes from his ability to be a great thinker despite his physical challenges," it said.