does anything affect the dividend (股息)

It is the dividend valuation model. Specifically, it states that the value of a share of stock is a function of its future dividends and that such dividends will grow over time at a specified rate of growth. In the basic dividend valuation model, dividends are expected to grow forever at a constant rate of growth, the value of a share of stock can be found as follows:
Value of a share of stock = next year’s dividends /required rate of return – constant rate of growth in dividends
This model succinctly captures the essence of stock valuation: Increase the cash flow and/or decrease the required rate of return and the value of the stock will increase.