专业连锁板块1月28日跌1.12%，博士眼镜领跌，主力资金净流出1.07亿元

Group 1 - The professional chain sector experienced a decline of 1.12% on January 28, with Doctor Glasses leading the drop [1] - The Shanghai Composite Index closed at 4151.24, up 0.27%, while the Shenzhen Component Index closed at 14342.9, up 0.09% [1] - Major stocks in the professional chain sector showed varied performance, with Ji Feng Technology down 0.12% and Doctor Glasses down 2.04% [1] Group 2 - The net outflow of main funds in the professional chain sector was 107 million yuan, while retail investors saw a net inflow of 64.69 million yuan [1] - The detailed fund flow data indicates that Doctor Glasses had a main fund net outflow of 50.08 million yuan, with retail investors contributing a net inflow of 50.07 million yuan [2] - Other companies like Tianyin Holdings and Maishide also experienced significant main fund outflows of 34.96 million yuan and 12.95 million yuan, respectively [2]