Back to 1937: My Codename Is A Piao

Lei Xiaojun is an online novelist who unexpectedly transmigrates to Shanghai in the late 1930s after having a brain-computer interface chip implanted. He becomes an intelligence operative for the Bureau of Investigation and Statistics, moving between the bureau, Japanese intelligence agencies, and the Communist Party. Using his multiple identities as cover, he exposes Japanese crimes and contributes to the resistance against Japan.