深圳上海机场单日客流创新高，多地迎返程高峰

Group 1 - The core point of the article highlights that multiple airports in Shenzhen, Shanghai, and other cities have experienced record-high passenger traffic on February 20, marking a significant return peak as the Spring Festival holiday comes to an end [1][5]. - Shenzhen Airport reported a passenger volume exceeding 210,000 on February 20, setting a new single-day record, with expectations for continued high traffic in the coming days [1][5]. - Shanghai Airport Group indicated that the single-day passenger traffic reached 424,900, with Pudong Airport accounting for 275,700 and Hongqiao Airport for 149,200, reflecting a year-on-year increase of 6.4% compared to the same period last year [1]. - Kunming Changshui International Airport also reported a record single-day passenger throughput of 170,600 on February 20, marking the highest since its opening [1]. - Zhengzhou Airport achieved a significant milestone with a single-day passenger throughput exceeding 100,000 for the first time since its inception in 1997 [1].