Market concentration: refers to the degree of concentration of an industry in the market structure. It is used to measure the difference in the number and relative size of enterprises. It is an important quantitative indicator of market power. Which of the following phenomena are relatively low market concentration? ['Pastry shops can be found near most markets in a city.', 'There are a large number of leather shoe manufacturers in a certain place.', 'Manufacturers of daily electronic products are mostly located in the Pearl River Delta and the Yangtze River Delta.', 'Qingyan Village near a small commodity market occupies a considerable share in the online retail market.']