Brazilian president Luiz Inacio Lula da Silva was scheduled to visit his Chinese counterpart, Xi Jinping at the end of March. Beijing would have been Lula's fourth international destination in less than 100 days in office.
Lula had to cancel his trip, which was set to include 200 business people, after catching pneumonia. His administration had hoped the China visit would alleviate political pressure at home.
Since returning to the presidency (his previous term was 2003-2010), Lula has already been to visit partners in the South American trade bloc Mercosur, Argentina and Uruguay, and recently flew to Washington DC for conversations with US president Joe Biden and members of the Democratic party over infrastructure investments, trade and climate change.
Globetrotting seems like quite an effort for a 77-year-old, third-term president who faces a deeply divided society. But Lula does it with a smile on his face. Since he first took office 20 years ago, the former metalworker has risen to the challenge of international diplomacy as a natural negotiator with political charm.
Building political legitimacy
As Lula kicks off his third term, foreign policy will be a tool for building his own domestic political legitimacy. His reputation currently appears to be greater abroad than at home.
Always a determined player on the international stage, Lula's administration spearheaded the construction of Unasur, a South American organisation set up to offset US economic and political power in the region. He also forged several alliances in the developing world.
Although Lula left office in 2010 with an impressive 83% approval rating, much of his political capital waned in the years that followed. This was largely thanks to his successor Dilma Rousseff's pitiful economic performance and to the mounting accusations of graft against top figures in his Workers' party.
But despite being indicted and imprisoned for corruption in early 2018 (at which point his domestic popularity plummeted), the admiration of foreign figures has endured. Some even visited Lula in prison, protesting what they called political persecution of the former president.
So, at the age of 77 - and with health problems - a big diplomatic play might be his best bet of leaving a presidential legacy.
Challenges of a new world order
But Brazil's capacity as a meaningful international player will depend on the administration's ability to navigate a world that is fundamentally different from the one of the early 2000s.
The country is not in its best shape, either. In the years following Lula's first two terms, Brazil went through a decade of decline, introspection and isolation.
Much of this is down to his immediate predecessor, Jair Bolsonaro. On Bolsonaro's watch, Brazil ranked second, at 700,000 recorded deaths, in total COVID fatalities. Massive areas of rainforest were burned, and the lands of the Yanomami indigenous people were devastated by large amounts of mining.
So, while Lula must capitalise on any residual international popularity to relaunch Brazil as a global player, he has a lot to do to restore his own country's economy and to heal the wounds of a divided society.
Lula's first task internationally - a tough challenge - is to strike a balance in his relationships with Washington and Beijing, Brazil's two foremost partners. So far, his new administration's even-handed strategy has worked fine. But if tensions between Joe Biden and Xi Jinping lead to further political instability - or if a Republican with a zero-sum approach to China gets elected in 2024, Brazil could find itself in a difficult position.
Lula has attempted to anticipate these problems by offering to broker peace between Russia and Ukraine. It was a way to dodge criticism by western powers, who wanted Brazil to engage in military assistance to the Ukrainian government - while still preserving Brazil's longstanding ties with Russia.
Lula's take on the war is part of what researchers have dubbed "active non-alignment". It is part of a broader Latin American strategy to safeguard policy space and instruments for national development strategies in an increasingly polarised international order. By offering itself as a high-profile mediator, Brazil wants to maintain trade and cooperation with all sides in the conflict.
Lula's balancing trick
But Russian-Ukrainian peace appears to be a long way off - and it will hardly come via mediators from the developing world. If Lula wants to create a legacy, he needs to build on Brazil's preexisting capacity, in both multilateral and regional terms.
One possible way is to restore Brazil's activism at the United Nations. He must also reestablish cooperation in issues as diverse as climate change, biodiversity, indigenous rights, vaccines, food security and development.
Another way is to rebuild South American integration. Regional organisations such as Mercosur and Unasur could help bolster global supply chains in critical sectors like energy and food that have been disrupted by the war in Ukraine. To do so, Brazil must reclaim its role as the continent's centre of economic gravity.
But there is an obstacle: Venezuelan president Nicolas Maduro. A persistent political, economic and humanitarian crisis in Venezuela has exposed the dangers of left-wing authoritarianism. Lula is one of the few leaders who have open channels with Maduro and may be able to help the country work towards a national reconciliation.
The question is whether Lula wants to get involved. Unlike left-wing leaders who recently rose to power in Chile and Colombia, Lula and the Workers' party have been unapologetically sympathetic towards dictators such as Venezuela's Maduro and Nicaragua's Daniel Ortega.
Overcoming the Brazilian left's outdated views on authoritarian socialism and anti-imperialism may be as daunting a challenge for the Lula administration as leaving a sound diplomatic legacy. But both steps are necessary if Lula really wants to make a difference in the region - and the world.
Author: Guilherme Casares - Professor of Political Science, So Paulo School of Business Administration (FGV/EAESP)