专业连锁板块12月30日涨0.66%，吉峰科技领涨，主力资金净流入2712.95万元

Group 1 - The professional chain sector increased by 0.66% compared to the previous trading day, with Jifeng Technology leading the gains [1] - On the same day, the Shanghai Composite Index closed at 3965.12, showing no change, while the Shenzhen Component Index closed at 13604.07, up by 0.49% [1] - Key stocks in the professional chain sector showed varied performance, with Jifeng Technology closing at 8.11, up by 4.92%, and Tianyin Holdings closing at 10.55, down by 0.28% [1] Group 2 - The net inflow of main funds in the professional chain sector was 27.13 million yuan, while retail investors experienced a net outflow of 35.84 million yuan [1] - Doctor Glasses had a main fund net inflow of 43.71 million yuan, but also saw a retail net outflow of 43.96 million yuan [2] - Jifeng Technology recorded a main fund net inflow of 20.47 million yuan, with a retail net outflow of 18.46 million yuan [2]