US President Joe Biden talked with his Chinese counterpart Xi Jinping for the first time in seven months Thursday, urging they ensure that "competition" between the two powers does not become "conflict," the White House said.

During the call, Biden's message was that the United States wants to ensure "the dynamic remains competitive and that we don't have any situation in the future where we veer into unintended conflict," a senior US administration official told reporters.

In Beijing, state broadcaster CCTV reported that the phone call was "candid, in-depth" and covered "extensive strategic communication and exchanges on China-US relations and issues of mutual concern," and that US policy on China has caused "serious difficulties."

This was the leaders' first call since February, when they talked for two hours, shortly after Biden took over from Donald Trump. The Biden administration official said the latest call lasted 90 minutes.

US-China relations went into a nosedive under Trump, who launched a trade war between the world's number one and two economies. Biden's administration, while urging multilateralism and an end to Trump's "America first" ideology, has kept trade tariffs in place and remains tough on other contentious areas of the relationship with Beijing.

However, the White House signaled that the diplomatic impasse is unsustainable and potentially dangerous, requiring intervention by the leaders in Thursday's call.

"We welcome stiff competition but we don't want that competition to veer into conflict," the official, who spoke on condition of anonymity, told reporters.

The goal of the call was to set out "guardrails" so that the relationship can be "managed responsibly."

These guardrails included making sure that US actions are not "misinterpreted" by China, the official said.

Lower level attempts to engage with China have not gone well, especially at an angry March exchange between Secretary of State Antony Blinken and top Chinese officials when they met in Anchorage, Alaska.

"We have not been very satisfied with our interlocutors' behavior," the senior official told reporters.

Accusing the Chinese of being mostly "unwilling to engage in serious or substantive" talks, the official said "we don't believe that that is how responsible nations act, especially given the global importance of the US-China competition."

Faced with the impasse, "President Biden understood the importance of engaging President Xi directly," the official said.

According to a readout from the White House after the call, Biden and Xi had a "discussed areas where our interests converge, and areas where our interests, values, and perspectives diverge."

- No 'breakthroughs' –
Thursday's call focused on "broad and strategic" issues, with no concrete decisions expected on outstanding issues or setting up a first Biden-Xi summit, the official said.

The list of disagreements between Washington and Beijing is long and growing.

Beyond trade, with the White House official complaining of "China's unfair and coercive trade practices," there is deepening tension over China's claims to Taiwan and numerous islands in the South China Sea.

Washington is also angered by what it says is China's refusal to cooperate with an international probe into the origins of the Covid-19 virus, which first broke out in China before sweeping worldwide.

There are areas where the two powers also find themselves having to cooperate or at least coordinate, including on North Korea's nuclear weapons program and the climate crisis.

The White House said that Biden and Xi discussed the Covid pandemic and climate, among other global topics. Biden also brought up concerns about Chinese cyber attacks against the United States.

But Thursday's call was "not about finding some sort of breakthrough agreements," the senior official said.

It was "about keeping the channels of communication open" and ending previous cycles where the relationship blew hot and cold.

"Our goal is, is to really reach a steady state of affairs between the United States and China," the official said.

Biden, who built a close relationship with Xi while serving as vice president under Barack Obama, clearly has belief in his powers of personal contact when it comes to diplomacy.

The senior US official said the two leaders spent some talking about past shared experiences and that the tone was "respectful" and "candid," without "lecturing."

Meanwhile, President Xi Jinping told his American counterpart that US policies towards Beijing have caused "serious difficulties" and that putting ties back on track was critical "to the destiny of the world", state media reported Friday.

Ties between Beijing and Washington have been strained in recent years by a bruising trade war and America's tough stand on China's human rights track record -- while competition over tech dominance and disputes over the origins of the coronavirus have further sullied relations.

In "candid, in-depth" talks with Biden, Xi warned that confrontation between the world's top economies "would spell disaster for both countries and the world".

"Whether China and the US can properly handle their relations... is critical for the future and destiny of the world," state broadcaster CCTV said citing Xi.  

"And this is a question of the century that both countries must answer," he said.

It was the first call between the two leaders in seven months.  

Xi stressed that the two sides should continue their dialogue on climate change, epidemic prevention and the global economic recovery, while "respecting our differences".

"China-US relations are not a multiple-choice question involving whether or not to do a good job," Xi said.

It is "a must-answer question on how to do a good job".