1. The mobile phone network is in poor condition. The signal is poor, and the mobile phone can't receive the signal. Observe whether the cell phone signal is full. If the cell phone signal is weak, you can try to get out of the room; Or shut down for 30 minutes; Or take out your SIM card and try another mobile phone.
2. Some SMS interception software is installed on the mobile phone. I don't know if it's a blacklist of contacts or in which software.
3. You may have applied to the operator to block SMS numbers or add blacklists.
4. Alipay's current mobile phone number is inconsistent with the fast payment reservation number. If the payment operation is fast, it is impossible to receive the SMS check code. It may be delayed, so wait patiently. If you don't get it all the time, it may be that the phone number reserved at the counter when you open the bank card is not the number you are currently using.
5. If your mobile phone is in arrears or turned off, please verify whether your mobile phone can accept short messages normally. If you stop or default, you will not receive the message.
Electronic invoice is the product of the information age. Like ordinary invoices, they are uniformly issued to merchants by the tax bureau. Invoice numbers are issued to merchants by adopting national unified coding and unified anti-counterfeiting technology. The electronic invoice is accompanied by the signature mechanism of the electronic tax bureau. There are two main reasons why online shopping invoices are difficult to open. First, the merchant deliberately does not invoice considering the cost; Second, many online stores have no physical stores and are not registered with the industrial and commercial tax authorities, so they are not qualified to provide invoices. Online invoice refers to the invoice issued by taxpayers through the Internet by using the online invoice application system provided by tax authorities. Compared with traditional invoices, online invoices do not need to go through the "tax control machine", and the person in charge of the enterprise does not need to register with the tax authorities frequently. But also can be completed instantly, the authenticity can be verified immediately, and the operation is simple and easy.
Compared with the traditional paper invoice, the online invoice management system can issue invoices online, saving the invoice cost, tax control computer cost and related labor cost. Although online invoices can facilitate more e-commerce enterprises to pay taxes, according to China's tax system and market environment, the survival of small and medium-sized enterprises, especially e-commerce enterprises, is very difficult.