Lin Faqin, professor from the School of Economics and Management of China Agricultural University, presented an academic report entitled "Weight Gains from First Fast Food Restaurants: Evidence from China" at the South China Economic Forum on the afternoon of Oct 29, 2020. The study used data from 11 rounds of the China Health and Nutrition Survey to match the density of KFC and McDonald's near the respondents' communities to examine the impact of the entry of multinational fast food restaurants on the weight of Chinese residents aged 4-60 years. The study found that the entry of KFC and McDonald's increased the incidence of obesity among Chinese residents, especially those with lower education levels and men. The article further estimates the resulting loss of welfare.

Professor Lin Faqin's report is novel in topic selection and rigorous in argumentation. Professor Wu Mingqin had an in-depth discussion with Professor Lin Fa Qin on the impact of the overlapping of the location of transnational fast food restaurants and Chinese restaurants on the estimated results. Professor Liu Asked Professor Lin Fa Qin for the placebo test of the model and the writing and contribution of English articles. More than 50 graduate students listened to Professor Lin's wonderful report in the form of online conference live broadcast.