Cannot get NEXT_QUARTER depth price

I can subscribe next quarter by using base url wss://stream.binance.com/stream and wss://dstream.binance.com/stream . But it doesn’t work for me. subscribe json string as {“id”:1,“method”:“SUBSCRIBE”,“params”:[“btcusdt_210924@depth”]}
Sending SUBSCRIBE method manually returns {“result”:null,“id”:1} and no other data return.
Did I do something wrong? How can I get fix this? Thanks~

Hi. Please check the symbol name via GET /dapi/v1/exchangeInfo https://binance-docs.github.io/apidocs/delivery/en/#exchange-information .
The symbol btcusdt_210924 is not listed in dapi.