Polymarket Developers: Exchange upgrade will go live at 19:00 Beijing time on April 28, with approximately 1 hour of downtime

Polymarket official development account Polymarket Developers posted on platform X, stating that the exchange upgrade will go live at 11:00 UTC (19:00 Beijing time on April 28), with an estimated downtime of about 1 hour. The V1 order book will be cleared, all open limit orders will be cancelled, and funds and positions will remain secure. Users trading via the API need to update to the latest SDK before this time; the v1 client will stop working after the switch.