There were quality issues, but it worked in the end.
When I connected this NIC to crs504-4xq-in, only one side port had to set "fec mode" to fec91 to link up.
There was no problem with fec mode auto on the other port, so I think there may be a problem with the quality of the product.
I felt that it was a little off from the "work perfect" product description.
However, as a result, I was able to connect at 100Gbps.
I am very happy with this.