The financing balance of the two cities decreased by 519 million yuan.

[financing balance of the two cities reduced by 519 million yuan] as of May 30, the financing balance of the Shanghai Stock Exchange was 796.023 billion yuan, 300 million yuan less than the previous trading day; the financing balance of the Shenzhen Stock Exchange was 721.134 billion yuan, 219 million yuan less than the previous trading day; the two cities totaled 1,517.157 billion yuan, 519 million yuan less than the previous trading day.