50 Yuan Bank of Pei Hai

The Bank of Pei Hai was a Communist-controlled regional bank operating in the Shandong-Bohai base area, and its notes circulated in direct competition with both Japanese military yen and Nationalist currency during the final years of the Second Sino-Japanese War. Maintaining any functional monetary system in an active guerrilla zone required constant improvisation — printing locations shifted, paper quality was inconsistent, and denominations were issued in response to immediate logistical needs rather than any coherent monetary policy.

The S3586B suffix designation indicates a distinct variety within the 1945 fifty-yuan issue, most likely differentiated by printer, ink color, or block character. These regional Communist bank notes were produced under conditions that make precise attribution genuinely difficult, and catalog varieties frequently reflect local printing decisions that left no documentary trail.