一、主营及产品情况公司主营人血白蛋白、静注丙球、肌注丙球等血液制品的销售，近三年主要业务收入构成及比例情况如下：表1：近三年主要产品销售收入单位：万元二、经营状况和行业竞争优势华兰生物的主要产品为人血白蛋白，占公司销售收入的80％以上，近三年来规模扩增较快。 I. Main products and products The company’s main sales of human blood albumin, intravenous injection of C-globules, intramuscular injection of C-balls and other blood products, and the composition and proportion of major business revenue in the past three years are as follows: Table 1: Main products in the past three years Sales revenue unit: 10,000 yuan Second, operating conditions and industry competitive advantage Hua Lan biological main product is human serum albumin, accounting for more than 80% of the company’s sales revenue, the rapid expansion of scale in the past three years.