China-US relations: why Wang Yi went back to Wolf Warrior mode after offering an 'olive branch'

When United States Defence Secretary Mark Esper floated the idea of a China visit by year-end last week it took many by surprise, coming just hours before a new fight erupted between the two countries over the closing of the Chinese consulate in Houston,

China's top diplomats were "neither prepared nor aware" of Esper's unusual overture, according to government sources in Beijing.

He made the offer during his otherwise strongly worded speech on Tuesday last week slamming China's "systemic rule-breaking" and "aggressive behaviour", in the South China Sea in particular.

The Chinese foreign ministry simply said it "noted" Esper's idea to ramp up "crisis management", highlighting Beijing's caution in the midst of the worst challenge confronting the two countries since they established official relations in 1979.

It came as Beijing had been anxiously waiting for positive feedback on Foreign Minister Wang Yi's offer for a reset of bilateral ties by reopening "all the channels of dialogue" earlier this month.

But Wang's conciliatory posture, rather rare in recent months, was met with an increasingly impatient, hostile administration under embattled US President Donald Trump, who was eager to get tougher on China to revive his imperilled re-election bid.

"Wang was genuinely looking for ways to de-escalate the tension with the US because China is concerned about the deteriorating trend," said Yun Sun, a senior fellow at the Stimson Centre in Washington. But a series of US actions "must have been a slap in the face after the 'olive branch' Beijing extended", she said.

In the weeks leading to the consulate closures on both sides, which Beijing lamented as "unprecedented escalation", Washington significantly piled pressure on Beijing, with muscle-flexing in the disputed South China Sea, sanctions on Hong Kong and Xinjiang and its warming ties with Taiwan.

In the face of the perceived American bullying, China's senior diplomats, including Wang himself, have begun to call out the US, ditching the usual ambiguity in Beijing's handing of its most important bilateral ties with Washington.

While it is not uncommon for Beijing to take jabs at Washington, Chinese officials have largely refrained from naming the US or specific American leaders over the years, even at the height of Trump's protracted trade war with China.

However, since July 13 when US Secretary of State Mike Pompeo denounced China's expansive claims in the maritime dispute as "completely unlawful", widely seen as a turning point for Washington's South China Sea policy, Wang has directly lashed out at the US at least five times.