Can the social security card number of Bazhong city buy social security in Chengdu?

Hello, the social security card of Bazhong city can not buy social security in Chengdu. The social security card of each city is not common, if it is a foreign social security, you can see the doctor in Chengdu but can not buy social security in Chengdu. Now the social security of each district, although all under the management of the Municipal Social Security Bureau, but the various districts and cities by their own social security system, foreign social security in Chengdu can be used can not be purchased, the purchase of the standard is not the same.