Refers to the provincial-level postal district ( Heilongjiang ).
This area is in the far northeast of China, near the border with Russia. It experiences extreme seasonal shifts, with long, snowy winters and humid summers. 2. Decoding the Numbers 156100 zip
Interestingly, Taiwan also uses a 6-digit system (often formatted as 3+3), where "100" refers to the Zhongzheng District in Taipei City. 156100 zip