| BI | Baidu Index |
| GPUA | Guanzhong Plain Urban Agglomerations |
| IFN | Information Flow Network |
| QAP | Quadratic Assignment Procedure |
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.