1. First, determine the number of shares held and the total share capital of the company. When calculating the total share capital, it is necessary to count all the issued shares, including listed shares, tradable shares and restricted shares.

2. Calculate the proportion of shareholding in the total share capital. For example, if you hold 5000 shares of the company and the total share capital is10,000,000 shares, then the shareholding ratio is 0.005%.

3. Fill in the shareholding quota in the relevant form, usually in the form of percentage. For example, if you want to buy a company's shares in full, then the shareholding limit should be filled in 100%.

4. If you don't own all the shares of the company, the shareholding quota needs to be filled in according to the actual situation. For example, if you only hold 50% of the company's total issued share capital, then the shareholding quota must be filled in 50%.