In an interview with a Times columnist, Biden said that the United States needed to get leverage back to use in negotiations with China.

"I'm not going to make any immediate moves, and the same applies to the tariffs," Biden said in the article published on Wednesday. "I'm not going to prejudice my options."

"In my view, we don't have (leverage) yet," he added.

The United States needs to develop a bipartisan consensus and increase government-led investments in research and development, infrastructure and education to better compete with China, according to the president-elect.

"I want to make sure we're going to fight like hell by investing in America first," Biden said.

Under the Phase 1 agreement signed earlier in the year, China agreed to increase purchases of American products and services by at least $US200 billion ($A270 billion) over 2020 and 2021.

The deal also leaves in place 25 per cent tariffs on a $250-billion ($A340 billion) array of Chinese industrial goods and components used by US manufacturers, and China's retaliatory tariffs on over $100 billion ($A136 billion) in US goods.

Biden's team will pursue policies targeted at China's "abusive practices", including "stealing intellectual property, dumping products, illegal subsidies to corporations" and forcing "tech transfers" from US companies to their Chinese counterparts, according to the interview.

On Iran, Biden said he stood by his views that his administration would lift sanctions if Tehran returned to "strict compliance with the nuclear deal".

"In consultation with our allies and partners, we're going to engage in negotiations and follow-on agreements to tighten and lengthen Iran's nuclear constraints, as well as address the missile program," Biden added.

Australian Associated Press