Second line. First-line brands refer to those brands that have high visibility and widespread influence in the market and are the targets of consumers, mainly foreign brands. Second-tier brands refer to brands with relatively weak market visibility and competitiveness. According to the query on Zhongyi Finance Network, Yufeng Mattress is one of the largest and most powerful soft mattresses in China, with superb technology and very good comfort. It is well-known in China, but not well-known in the international market. Therefore, Yufeng mattress is a second-tier brand.