However, there is no preferential treatment for those in the province and Xi 'an, and there is no preferential treatment for those outside the province in Qinhuangdao.
It is cost-effective to buy a card at random in Qinhuangdao.
Families in two cities can apply for three cities in the province as roaming concessions, and each city has a monthly 2 yuan function fee; Or apply for two provinces other than the two provinces as roaming preferential provinces, and each preferential province has a monthly function fee of 3 yuan, so you can enjoy the call preferential treatment in the roaming city or roaming province of the application province.