The Hong Kong Jockey Club form guide lists the weight of each horse for each of their races. For a horse coming off a long layoff, they might be 50 pounds higher than normal then their next few starts might show less weight as they get fit. A horse that is going the wrong way might be carrying less weight than they should. They have mostly older geldings there so you don't have to worry about horses gaining weight as they go from two to three years of age, etc.