Anta Sports (HK: 2020) (OTCPK: ANPDY) stock is up 7% in Hong Kong today. There's no specific news concerning the company, this seems to be part of a general rise in China focussed stocks today. There's been much worrying about - often enough replaced with euphoria about - the Chinese economy recently. So, the bellwether stocks are up and down based upon those changes in sentiment.
As to what Anta Sports does, it's the major sportswear manufacturer and brand within China. As such we can think of it as having a similar position to Adidas, or to Nike, elsewhere. It also owns the Fila brand which at least some westerners will have heard of.
As with all of these brands the actual products are pretty much the same, they're largely all made in the same, or similar, factories. It's the brand, the overall lifestyle impact, which makes the difference. It's also true that the advertising and sponsorships necessary to create the brand become a substantial part of the cost base of the brand - there are no free lunches here.

Anta Sports share price from Hong Kong Stock Exchange
As to the current moves in the Anta share price, we can think of it as an indicator of investor sentiment over the consumer part of the Chinese market. As the country emerges from its own - and later - lockdowns there are obvious concerns about how the economy in general is going to do. On the stock markets that means that the property companies bounce around on opinion about whether there will be monetary or fiscal stimulus - they rely upon interest rates after all. The car companies are a separate issue, each fighting for leadership in EV production and sales.
Anta Sports can be seen as a bellwether of how investors think the consumer market is going to do. If real wages are rising strongly then we can - and would - assume that spending upon branded clothing - this is a luxury product in both the colloquial and also the stricter economic senses - is going to rise strongly too. In fact as disposable incomes rises faster than GDP, we would expect branded sales to rise faster than GDP too.
Our assumption here is that Anta is up today, just as with many of the other larger Hong Kongt stocks, on a turnaround in sentiment about that Mainland economy.