US President Donald Trump said, It could extend the March 1
Chinese and US officials will have high level talks this week aimed at stopping their injurious trading war.
The United States officials said it was a hard deadline on March 1 to deal with tariffs.
The two countries placed a bill on billions of dollars of the value of other goods.
This week's level level talks began in Beijing. High level debates, led by US Treasury Secretary Steven Mnuchin and Deputy Chief of China Liu He, will be starting on Thursday as the two sides move ahead before the deadline of March 1.
"If we are close to discussions when we think that we can really deal with it and do it, I could allow the slider to allow it for a while," Mr Trump said reference to deadline on March 1st.
"But in general, I do not want to do that."
The US imposed tariffs for the value of $ 250bn (£ 193bn) of Chinese goods, and China has repayed by imposing a duty of $ 110 billion of US products.
In December, both countries agreed to stop new tariffs for 90 days to allow talks.
The United States said that it would increase tariff rates of $ 200bn worth of Chinese imports from 10% to 25% if both sides do not have an advantage by March 1.
Mr Trump also threatens additional tariffs at an additional value of $ 267 billion of Chinese products.
Washington emphasizes Beijing to make changes to its economic policies, which he says unfairly for domestic companies through subsidies and other support.  He has also accused the government in supporting technological stealing as part of its wider development strategy, and in China there is an understanding that the United States is using the trade war to raise the country.