Generally, these sporting goods are cheaper abroad than at home, and the domestic tax rate is higher, so they are more expensive. Many foreign countries encourage the development of sports, so the price of sporting goods is very low.
Moreover, Nike is a luxury brand in China, and people in China are richer. A pair of shoes is still in short supply and cannot be sold.
Foreigners are much more sensible. For Americans, Nike and Adi are equivalent to our binary stars, and they can afford to wear them with or without money, so different positioning and pricing strategies are of course different.
Although the consumption level in Britain is very high, and nothing is cheaper than China, it does not rule out that there are products with special prices.