The country has put steep tariffs on an array of goods. Seventeen of the world's 20 largest economies have broken recent promises not to take protectionist measures.
President Luiz Ignácio Lula da Silva met with French President Nicolas Sarkozy in Paris Wednesday before heading to the G-20 summit in Britain.
China's deep reserves and continued growth put it in a position of strength.
In a prime-time press conference, he said reviving the economy will take "many months" and "many solutions."
'Substantial' fiscal and monetary moves across the globe will get traction, US Treasury secretary says.