What is the following description of a cascade meeting incorrect?

When the MCU performs single-channel cascading, the upper and lower cascaded venues need to occupy the port resources of the MCU, and the single-channel cascaded venue needs to occupy 1 fully

adapted port.

In cascaded meetings, the operation of meeting control of the lower venue is not supported.

MCUs support automatic cascading and manual cascading. Cascade conferencing is supported between

VP98/C1oudMCU/VP96 series MCUs.