The Yellow-breasted Bunting Emberiza aureola and the Siberian Blue Robin Larvivora cyane are typical migrants along the East Asian-Australasian flyway. While the global population of the Yellow-breasted Bunting has experienced dramatic decrease over the past two decades and the population of the Siberian Blue Robin also shows a declining trend, however, their population status in China still remains unclear. Bird banding provides important data to monitor bird population dynamic and bird migration. The Qinhuangdao Bird Banding Station is situated at a forest farm at Bohai Bay, and locates in north middle section of the East Asian-Australasian Flyway, with a variety of migratory passerines. Based on the banding data from the Qinhuangdao Bird Banding Station during 1999 to 2019, we analyzed the population dynamic and migration timing of Yellow-breasted Bunting and Siberian Blue Robin. The results indicated that the population of Yellow-breasted Bunting fluctuated in a 4﹣5 year-cycle, and decreased by 97.7% in the past 21 years at an annual rate of ﹣17.3% (Fig. 1). China government has enhanced the conservation and management of Yellow-breasted Bunting and its habitats in recent years, and listed it as a First Class National Protected Animal in early 2021, which would contribute to its population recovery gradually. The population of Siberian Blue Robin decreased by 4.2% annually. The decreasing mainly occurred during 1999 to 2003 and thereafter the population kept stable (Fig. 1). The daily capture peak of Yellow-breasted Bunting kept for about 15 days in spring, much shorter than the duration of 47 days in autumn (Fig. 2). This indicated that Yellow-breasted Bunting migrated much faster in spring than that in autumn, probably due to a time-minimization strategy for breeding. The capture peak of adult male, adult female and juvenile of Siberian Blue Robin occurred in sequence, with an interval of 4﹣5 days (Fig. 3), indicating that this species took a strategy of differential migration so as to reduce intraspecific competition at stopover sites and resting grounds, and adult males arriving earlier in breeding grounds to occupy optimal territory. To better understand the extent of population decline of the population of Yellow-breasted Bunting and other vulnerable passerine species in East Asian- Australasian flyway, and efficiently save these birds, we suggest a jointly standardized field survey such as bird banding in the flyway level (Table 1), and taking measures to resume habitats and control illegal hunting.