Create README.md

Hitmanv · Sep 13, 2017 · 5efbada · 5efbada
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+## description
+useful db collections
+
+## location database
+### country-state
+id | parent_id | name 
+--- | --- | ---
+1 | 0 | china
+2 | 1 | hujian
+
+### province - city - region of China in Chinese 
+id | parent_id | name | level
+--- | --- | --- | --- 
+1 | 0 | 中国 | 0
+2 | 1 | 北京 | 1