Is a cup of Jiuyang soybean milk 4 yuan reasonable?

Reasonable. Jiuyang soybean milk belongs to Hangzhou Jiuyang Soybean Industry Co., Ltd. According to the inquiry of official website of Hangzhou Jiuyang Soybean Industry Co., Ltd., the cost of Jiuyang soybean milk is 3 to 4 yuan, so it is reasonable to sell it in 4 yuan. Scope: Research and development of soybean milk ingredients; R&D, sales and leasing of household soymilk machines and commercial soymilk machines.