It can be seen that shares and shares are the relationship between form and content and cannot be confused. Competition refers to the economic subject in order to maintain and expand their own interests and take all sorts of behavior, the behavior of self-protection and expansion efforts in product quality, price and service advantages, varieties, etc. The focus of 2017 also includes making blockchain workplaces more attractive. It is not obvious in some analyses, but it is important to note that economic profits include opportunity costs. The profit of an entrepreneur (normal profit) is usually positive, but economic profit can be either positive or negative (loss). That's why the opportunity cost is included: in a completely competitive market, when marginal cost equals marginal revenue, profit maximization or loss minimization conditions arise. If the market price is lower than the total average cost, which means that the economic profit is negative, the entrepreneur needs to compare the value of the loss and the average variable cost. If the business continues to operate, the negative economic profit must not be lower than the average variable cost, otherwise the entrepreneur would rather shut down the company than continue to take the loss. Tax on the transfer of stamp duty equity. Equity transfer are two situations: one is in Shanghai and shenzhen stock exchange trading or managed enterprise equity transfer, the transfer shall be in accordance with the securities (stocks) stamp duty tax rate of 3 ‰ securities (stocks) stamp duty. The second is the transfer of equity in an enterprise which is not traded on the Shanghai or shenzhen stock exchange or in custody. The transfer shall be held on September 18, 1991