The A-shares actually have a simple model; you just look for those companies that are listed in both A and H shares. If the H shares are at a premium (H share valuation is higher than A share), then it is definitely a good company, even considered exceptionally good. This is because H shares have much poorer liquidity and other aspects compared to A shares, and most foreign investors do not recognize Chinese assets, so H shares are generally at a discount. So when you find a company with H shares at a premium, it must be a core asset. For example, CATL, for example, Zijin Mining.