Group 1 - The controlling shareholders of Youbang Ceiling, Luo Lianqin and Shi Shenxiang, are planning a change in control, leading to a trading suspension of the company's stock for up to two days [1] - Luo Lianqin and Shi Shenxiang collectively hold 66.56% of the company's shares, with Shi Shenxiang serving as the chairman and Luo Lianqin previously on the board until May [1] - The company has faced challenges in profitability despite significant revenue growth since its IPO in 2014, with net profit growth remaining weak [2] Group 2 - Youbang Ceiling was founded in 2004 and claims to have invented the first integrated ceiling, becoming an industry pioneer [2] - The company has expanded its product offerings to include bathroom air conditioners, drying racks, and wall panels, but these new ventures have not significantly contributed to overall performance [2] - The stock price of Youbang Ceiling has experienced significant fluctuations since its listing, peaking at 123.15 yuan per share [2]