全国省市二级表，包括港，澳，台，方便使用。二级表，省市之间有指向本表的外键项链，三张表分别是utf-8,iso,gbk编码方式的，方便不同的人使用-National and provincial secondary tables, including Hong Kong, Macao, Taiwan, and easy to use. Between two tables, provincial and municipal point to this table foreign key necklace, three tables are utf-8, ISO, gbk encoding, convenient different people use