A banker with direct knowledge of the transaction said China would likely seek to raise more than $3 billion, in line with the size of last year's deal.
The term sheet showed there will be four tranches of bonds, which have not been rated by any agency. A person familiar with the transaction said the tranches would be three-, five-, 10- and 20-years in maturity.
It would be the third transaction since 2017 when China launched its first U.S. dollar bond in 13 years.
The 2017 deal raised $2 billion while a separate transaction in 2018 raised another $3 billion.
Frances Cheung, head of Asia macro strategy at Westpac in Singapore, said the deal would be closely watched by global investors.
"The issuance will likely prove the popularity of China sovereign bonds, but more importantly, hard currency issuances help set up a benchmark for Chinese corporates to raise funds in foreign currencies," she said.
China sold its first euro-denominated bond in 15 years earlier in November, raising $4.4 billion and analysts believe the European markets will become a greater source of funds for the mainland in the future.
BNP Paribas analyst Tianhe Ji said the sovereign issue would also support the development of a U.S. dollar bond market for corporate debt issuers.
"The China offshore U.S. dollar bond market is increasingly mature, it’s necessary and valuable to have a full China sovereign US dollar interest rate curve," he said.
The euro issuance was seen as a benchmark for Chinese issuers in the euro market, which could help steer corporate issuance away from dollar-denominated debt, at a time when China and the United States are embroiled in a protracted trade war.
The term sheet for the U.S. dollar transaction, which is due to begin Tuesday, shows the Chinese government has appointed Bank of China and Bank of Communications to lead the deal.
China's government has also mandated Bank of America Securities, China Construction Bank, China International Capital Corporation (CICC), Credit Agricole, Taiwan's CTBC Bank, Deutsche Bank, Goldman Sachs, HSBC, JPMorgan, Mizuho Securities and Standard Chartered Bank.
(Reporting by Scott Murdoch, Andrew Galbraith, Noah Sin and Cheng Leng; Editing by Neil Fullick, Sam Holmes & Shri Navaratnam)
By Scott Murdoch and Andrew Galbraith