What's the difference between fast charging and flash charging?

Compared with other fast charging schemes, flash charging has higher charging power and 95% power conversion rate. The fastest charging speed is more than 4 times faster than the general mobile phone charging technology, and 50% faster than other fast charging technologies. (From Baidu Universal Service, Baidu Search Flash Charging) In contrast, there are two kinds of fast charging for some mobile phones: one is to use Apple's standard 5V/2A charging, and it will be full within 3 hours; The second is the standard configuration of Xiaomi 4, which is the Qualcomm Fast Charge 2.0 standard. 9V/ 1.2A, filled in 2.5 hours, and the efficiency increased by about 15%. However, it belongs to high voltage and low current charging, and there is no safety guarantee and no national safety patent standard. It solves the problem of charging and heating of mobile phone, and can bring better experience to users.