Brazil's state-run oil company Petrobras secured US$7bn in financing from China as part of a raft of economic cooperation deals struck by the countries on Tuesday.
Brazilian President Dilma Rousseff and Chinese premier Li Keqiang signed 35 agreements worth more than US$53bn during a ceremony in Brasília.
The accords include investments in the energy, mining, infrastructure and manufacturing sectors.
The Petrobras deal comprises a US$5bn commitment from the China Development Bank (CDB) and a US$2bn credit line from the Export-Import Bank of China (Cexim).
Tuesday's announcement comes less than two months after Petrobras secured a separate US$3.5bn loan from the CDB.
Analysts say the financing deals will ease pressure on Petrobras, whose ability to bankroll new projects has been limited by a corruption scandal and falling oil prices.
Rousseff said she had invited the Chinese government and businesses to participate in new refinery and shipyard projects.
A cooperation pact was also signed in the areas of renewable and nuclear energy, Brazil's leader said.
Meanwhile Brazilian development bank BNDES said it would loan US$1.3bn to Hainan Airlines after the Chinese company agreed to buy 40 commercial planes built by Brazil's Embraer.
Hainan will receive 10 of Embraer's E-195 aircraft during the first phase of the agreement in 2016 and 2017.
China is Brazil's top trading partner with bilateral trade totaling about US$80bn in 2014, according to the Brazilian government.
(Published by BN Americas - May 19, 2015)