饰品板块8月28日跌0.78%，菜百股份领跌，主力资金净流出2.29亿元

Group 1 - The jewelry sector experienced a decline of 0.78% on August 28, with Caibai Co., Ltd. leading the drop [1] - The Shanghai Composite Index closed at 3843.6, up 1.14%, while the Shenzhen Component Index closed at 12571.37, up 2.25% [1] - A table detailing the individual stock performance in the jewelry sector was provided [1] Group 2 - The jewelry sector saw a net outflow of 229 million yuan from main funds, while retail funds had a net inflow of 202 million yuan [2] - Speculative funds recorded a net inflow of 27.56 million yuan [2] - A table showing the fund flow for individual stocks in the jewelry sector was included [2]