HashKey Pro was released in Asia by a cryptocurrency expert Xiao Feng and his team of skilled engineers. The exchange is no longer operational, as stated on its homepage: "From December 2020, HashKey Pro will not be accessible for deposits and trading services throughout the platform, often without restriction BTC, GNT, VEN, and XRP."
The exchange's latest tweet was in May 2019, and the Telegram chat is no longer operational. As a defunct exchange, there is no trading activity in this exchange, implying that the daily trade volume is zero.
Because the exchange explicitly declared its plan to shut, it cannot be classified as a Scam exchange.