Group 1 - The core viewpoint of the article indicates that the Beijing second-hand housing market experienced a decrease in transaction volume in April, with a total of 15,569 units signed, reflecting a month-on-month decline of 19.05% but a year-on-year increase of 16.59% [1] - The decline in market activity in April is attributed to the release of pent-up demand and school enrollment needs that were concentrated in March, leading to a decrease in the overall market activity in April [1] - Despite the decrease, the transaction volume for second-hand housing in Beijing remained at a relatively stable level in April [1]