Does China have 5G network?

China is just one country where 5G is available . There are also mobile telecom providers releasing 5G in the US.

Huawei has already finalized more 5G contracts than any other telecom company, half of which are for 5G networks in Europe.29 Mar 2021

T-Mobile has the largest 5G network by a considerable margin. T-Mobile started building a 28GHz or 29GHz high-band mmWave network in the middle of 2019 before following it up with 5G on its 600MHz spectrum.