A man rides his bicycle across the street under the Guomao bridge at the Central Business District in Beijing, China, October 19, 2015.
Bank of China didn't immediately reply to a Reuters' request for comment.
The move follows pay cuts being made at investment banks such as China International Capital Corp (CICC) (3908.HK).
Two of the sources said the bank had finished implementing the plan at its headquarters in the first half of the year.
A third source said the bank's Shanghai branch staff last week received notice that the bank would be reducing pay gaps there.
Persons:
Jason Lee, Xi Jinping, Bank of China didn't, Ziyi Tang, Rong Ma, Ryan Woo, Hugh Lawson
Organizations:
Central Business District, REUTERS, Bank of China Ltd, Communist Party, Bank of, China International Capital Corp, HK, of, Central Commission, Inspection, Shanghai, Thomson
Locations:
Beijing, China, BEIJING, Bank of China, of China, Shanghai