Xiaomi – the fourth-best-selling phone manufacturer in the world – added to Britain to grow in the list of markets.
China's home ground line includes three smartphones, a cordless connection for fitness tracking and an electric scooter.
A shop at London's Vestfield Shepherd's Bush shopping mall, also owned by Apple, opens.
The launch extends its presence in Western Europe, where it is also active in Spain, France and Italy.
Xiaomi has a reputation for competitively pricing its products and a desire to maximize earnings by giving priority to the volume over the profit margin.
Earlier this year, he announced that he would limit the net profit margin of hardware products to 5%, indicating that this move would help convince customers that it was a brand that could be reliable.
According to IDC research company, only sales of Huawei smartphones outperform it in terms of growth among major manufacturers.
|Company||Delivery of smart phones from July to September||Annual changes in shipments||Current market share|
|The others||119.9 million||-19,9%||33.8%|
|In total||355.2 million||-6.0%||100.0%|
Source: IDC – based on preliminary data
Kiaiaomi's first leading phone for the UK will be the Mi 8 Pro – an Android phone with a fingerprint sensor hidden behind its 6.2 inches (15.7 cm) display and transparent glass through which some of its components can be seen.
It starts with 499 pounds. This is significantly less than the premium premiums sold in the state of Apple, Samsung, HTC, Sony and Huawei, but it agrees with the price of OnePlus's new 6T.
Co-founder Xiang Wang told the BBC that Xiaomi intended to expand its product offer in the UK in 2019, and also could launch its own P-brand sub-brand.
And while he said his company currently has no plans to maintain one of its famous "flash sales" in the country – in which limited quantities of new devices are put up for sale at a certain time – he hinted that they could be offered a later date that help in raising awareness.
"When Xiaomi enters the country, it almost always grows very fast," said Neil Mavston from the analytics consulting strategy.
"It happened in India, Indonesia and Russia, and now we see that it is rapidly developing in Spain.
"The biggest risk of losing sales in the UK is Samsung, Huawei, TCL Alcatel, LG and ZTE – Apple is probably safe because it plays at much higher prices."
Another expert added that it would be wrong to focus exclusively on the ambitions of a smartphone company.
"It's a decrease in the amount of products that Xiaomi products produce," said Ben Vood of the CCS Insight consulting firm.
"When you go to one of your stores in Hong Kong, it's incredible – there's everything from robotic vacuum cleaners to smart bulbs to air cleaners to electric toothbrushes.
"But the big question for me is whether this is too big a market because there is already an impeccable level of competitive intensity, especially among smartphones."
However, the third analyst said that the Chinese company may have chosen the perfect time to join the problem.
"After Britain abandons the European Union, we may see consumers withdrawing discretionary spending, resulting in a fall in the average selling price moving forward," said James Smith of Futuresource Consulting.
"If a consumer wallet squeezes … we may see an increase in demand for mid-range phones, a market where Xiaomi has a strong offer."