It is produced and sold in Europe, but smuggled to the mainland for sale, so mainlanders call it the European version of the mobile phone.
Originally intended to be sold in Hong Kong, it was smuggled to the mainland for sale, which is the so-called Hong Kong version.
Some people like to buy these because the Hong Kong version and the European version are fully functional and cheap. Because Chinese is used in Hong Kong, the Hong Kong version of the mobile phone generally has Chinese, while most parts of Europe do not use Chinese, so the European version of the mobile phone system has no Chinese.
In order to make the European version of the mobile phone into a Chinese version, some people will use the method of brushing the European version of the mobile phone system into a Chinese version. The input method will go to the Sogou mobile phone input method website to download the installation file corresponding to the mobile phone model and install it on the mobile phone.