Traffic cards can be purchased at designated counters in bus stations, subway stations, passenger stations and some shopping malls. The price is RMB 130 yuan, including the card fee of 40 yuan and the deposit of 90 yuan. You can swipe your card directly when using it, which is convenient and fast. As for the use of mobile phone cards, the following are some suggestions: 1. Buy a mobile phone card: You can buy a mobile phone card at the counter of CTM or China Mobile. Generally speaking, the network coverage of telecom is wider, but the price of China Mobile is more affordable, so you can choose according to your personal needs. 2. Handling a mobile phone card: After purchasing a mobile phone card, you need to bring your ID card (passport or ID card), valid visa and mobile phone card to the counter of the local telecom company for activation. 3. Recharge package: After activating the mobile phone card, you can choose a recharge package. Telecom and mobile have various packages to choose from, including different voice, SMS and traffic quotas. You can choose the right package according to your personal needs. 4. Network coverage: The mobile phone network covers most areas, and the call quality is good, so mobile data and Wi-Fi can be used normally. 5. Data traffic: Pay attention to traffic restrictions when using mobile phones to surf the Internet. There is no data consumption through Wi-Fi connection, but when using mobile data, you need to pay attention to the traffic usage to avoid extra expenses caused by exceeding the package limit. 6. International roaming: If you plan to use your mobile phone in other places, you can learn about international roaming fees and packages. You need to pay extra for international roaming. It is recommended to consult the telecom operators in advance to understand the corresponding regulations. Please note that the above strategies are for reference only, and the specific operation and cost may be different. It is recommended that you consult your local telecom company to obtain accurate information when purchasing and using mobile phone cards.