In 2013, the USB 3.1 standard was released, increasing the maximum USB speed to 10 Gbps. Standard The highest USB standard is renamed USB 3.1 Gen 2 and the original USB 3.0 port is renamed USB 3.1 Gen 1. The plastic sheet in the USB 3.1 Gen 2 port was changed from blue to light blue for differentiation. USB-IF doesn't seem to be trying to distinguish between the two standards, either as a name or as a color identifier.
The USB-C interface standard came out in 2014. USB-C no longer distinguishes between front and back and is small enough to be used on portable devices, which is currently the most common port on smartphones. However, USB-C is just a physical port, and the USB standard used on different USB-C ports is not fixed, which foreshadows the "same port, different functions" mess.
In 2017, the USB port standard was upgraded to USB 3.2, the latest version of which can transfer data at a rate of 20 Gbps -- which is a good thing, but the naming standard in USB 3.2 is pretty jaw-dropping:
Renamed USB 3.1 Gen 1 (aka USB 3.0) to USB 3.2 Gen 1 with a maximum speed of 5 Gbps;
Renamed USB 3.1 Gen 2 to USB 3.2 Gen 2 with a maximum speed of 10 Gbps and added USB-C support for this mode;
The newly added transfer mode is USB 3.2 Gen 2 x 2, with a maximum speed of 20 Gbps. This mode supports only USB-C, not the traditional USB Type-A port.
If you do not know the data cable standard, you can consult wushuang customer service at any time.
