The two countries signed a dozen deals in areas including trade, finance and smart cities on Wednesday, the first day of her trip, which ends in Shanghai today. "But I'm clear there's a difference between those people who came prior to us leaving and those who will come when they know the U.K.is no longer a member of the European Union", she said.
She has been criticised for not providing enough detail on her Brexit strategy on top of the complex timings for the negotiations.
Full negotiations on the UK's 2019 exit are to resume on Monday.
Both sides agreed on the broad principles of the transition period.
However, he said companies must maintain sufficient presence in the bloc to retain the passporting right and said the European Union will ensure there is "supervisory convergence" so that "we do not start some supervisory or regulatory race to the bottom just to attract certain businesses from the UK".
China and the United Kingdom have agreed to advance bilateral relations in a number of different fields, including trade, finance and technology.
"It is fair to say the prime minister has an open mind when it comes to these negotiations", a Downing Street spokesman said.
She told me she did not see those as alternatives and insisted she has spelled out what she really wants from the deal.
What is most striking is that some who supported her have, at the very least, become wobblier.
In a speech to the UK-China Business Forum, the Prime Minister said: 'The UK and China together have the capacity to play a huge role in advocating for gender equality. But they are aware of the challenges at home as well as overseas.
"I don't believe that those are the alternatives", she said.
"We are doing the work that people voted for - Brexit", said May.
The PM said this was a "first step towards delivering ambitious future trade arrangements".
China's state-run media praised Theresa May on her visit after she wisely "sidestepped" human rights issues.
He said China and Britain should cooperate at a higher level within the framework.
During her three-day trip to China, Theresa May has agreed to a joint trade and investment review with China.
Timing. The Council advises that the transition period should end on December 31, 2020.
They have called for the prime minister to be clearer about her own position.
"Because we would therefore be dependent on what the European Union negotiated in terms of its trading policies and we'd be following behind that".
"There is more trade that we can do even before we get to those free trade agreements".
Dr Fox has said that Britain can not be involved in any customs union with the EU following Brexit.