President Joe Biden and first lady Jill Biden react upon arrival in Cornwall, England, on Wednesday. On Friday, Prime Minister Boris Johnson will host the Group of Seven leaders at a three-day summit in Cornwall, as the wealthiest nations look to chart a course for recovery from the global pandemic.

CORNWALL, United Kingdom — President Joe Biden arrived in the United Kingdom on Wednesday to begin a week of summits and meetings in three countries. His first international trip as president comes almost five months after he took office and as the pandemic is finally easing across Europe and the United States. According to aides, he’s set to meet with more than 30 world leaders.

The first three days will center around the annual summit of the Group of Seven leaders from the world’s biggest democracies. British Prime Minister Boris Johnson is this year’s host and is welcoming Biden and the other heads of state to Cornwall on England’s western coast, where Johnson spent summers as a boy.

Here are three story lines to watch as the G-7 unfolds through this weekend:

1. Can Biden get allies to be tougher on China?

Biden intends to firm up the trans-Atlantic alliances, yet European leaders have no doubt taken note that the first two foreign leaders he invited to the White House were from Japan and South Korea. That underscored the priority he’s placing on the Indo-Pacific region and the overarching goal of constraining China, America’s biggest economic rival.

Japan is also among the G-7 nations, but the other nations are Western countries: Britain, France, Germany, Italy and Canada, along with the 27-nation European Union. Biden is eager to secure more explicit commitments from allies to crack down on Beijing’s violations of intellectual property rights, cyberespionage and human rights abuses and at the same time to strengthen their domestic supply chains to reduce reliance on Chinese products.

The question is just how willing Japan’s and Europe’s leaders will be to go along, given their countries’ economic ties to China.

2. Who will he bond with?

Biden, at 78 and after decades as a foreign policy leader, is a familiar and reassuring presence to G-7 allies, especially after their four years dealing with his unpredictable predecessor. Yet he doesn’t know some of his counterparts all that well, making it unclear who will emerge as his main interlocutor on the other side of the Atlantic.

German Chancellor Angela Merkel, who worked closely with President Barack Obama as well as Biden, is in her final year in office. Also familiar to Biden is France’s Emmanuel Macron, but he wants to demonstrate independence from Washington. And Johnson, who rose to power by backing his country’s exit from the EU, is not a natural partner for Biden, especially given the president’s emphasis on multilateralism and the strains Brexit created for the Northern Ireland peace process in which Biden has long been deeply invested.

Allies have been somewhat disappointed that Biden didn’t consult more about his actions on vaccines and on the U.S. withdrawal from Afghanistan, where some of the other countries also have troops.

“Biden will be very welcomed,” said Heather Conley, a Europe expert at the Center for Strategic and International Studies, a Washington think tank. But, she added, European nations “had a higher expectation at the beginning that the Biden administration would be clinging more to their agenda.”

3. Can Biden deliver a global minimum tax?

Prior to the G-7, Treasury Secretary Janet L. Yellen succeeded in convincing the other member nations’ finance ministers to sign off on a global minimum tax of 15% — an attempt to level the international playing field by reducing the incentive for large multinational corporations to relocate to countries where taxes are lower.

The White House has touted the agreement as evidence that Biden is leading on the world stage. But at home, Republicans in Congress have made clear they oppose the idea, raising questions about whether it will ever become U.S. law. To the extent the minimum tax is a summit topic, it will be worth watching whether other G-7 leaders express any skepticism about Biden’s ability to deliver — as a gauge for just how much faith they have in his chances of enacting his agenda generally.