What is the reason why China Railway E-Pass voice message can't be heard?

I can't hear the voice message of China Railway E-Pass, which is a cache failure.

When a friend sends a voice message to himself, the user can see the message record without clicking, but in fact, the message is saved on the server, and the message will be cached in the user's mobile phone when the user clicks. If the prompt "WeChat voice playback failed" appears, it is mostly caused by some accidents during the caching process. As long as the user clicks the voice message for the second time, it can be replayed.

flick

Let me briefly talk about the communication process of users using WeChat. When users run WeChat on their mobile phones and then chat with friends by using the voice function of WeChat, although this message is passed between users, it needs to be completed through servers and services provided by network operators, such as mobile phone card traffic packets and WiFi networks in home networks. Although the server, mobile phone card traffic and WiFi network are relatively stable in theory, there will inevitably be some unexpected fluctuations in the transmission process, which may cause users to malfunction when playing voice messages. When you encounter this prompt, after switching the network, play the voice message again and you can play it normally.

Mobile phone problem

If the problem still exists after trying the first two methods, it may be caused by the full memory of the mobile phone. There are two kinds of mobile phone memory, one is running memory. The size of running memory determines the number and speed of running software, while the size of body memory determines the amount of data stored in the mobile phone. The voice message in WeChat is also a kind of data. The voice message is temporarily stored in the server before the user browses the message. After browsing, it will be cached in the body memory of the mobile phone. If the memory of the fuselage is full, it will cause WeChat to be unable to cache voice messages and the playback will fail. In this case, try to clean up some data stored in the memory of the fuselage, and you can play the voice message normally.