Group 1 - The cosmetics sector experienced a decline of 1.35% on December 5, with Qingdao Jinhao leading the drop [1] - The Shanghai Composite Index closed at 3902.81, up 0.7%, while the Shenzhen Component Index closed at 13147.68, up 1.08% [1] - Notable gainers in the cosmetics sector included Jinsong New Materials, which rose by 4.27% to a closing price of 16.10, and Qingsong Co., which increased by 4.10% to 7.61 [1] Group 2 - The cosmetics sector saw a net outflow of 58.93 million yuan from institutional investors, while retail investors had a net inflow of 101 million yuan [2] - Key stocks with significant retail inflows included Shanghai Jahwa, which had a retail net inflow of 8.45%, and Qingsong Co., with a retail net inflow of 6.08% [3] - Qingdao Jinhao experienced a net outflow of 59.69 million yuan from institutional investors, indicating a negative sentiment towards the stock [3]