If the water drainage of the cup is not good, it can be artificially perforated to increase its drainage capacity. However, not all cups can be perforated. It's easy to make them crack and cause them to be completely discarded.
If the drainage capacity of the flowerpot itself is not good, a little medium with larger particles can be padded at the bottom, such as ceramsite, brick, cinder, etc. This can make the water sink, will not form water in the root, avoid flooding the root system to make it rot.
If you can't open the circle, you have to throttle. Reduce the amount of water for daily watering, only half of the normal amount of water. This can prevent the root from being submerged, and if there is water at the bottom, it will also make the basin soil in a wet state, which is also helpful for its growth. The interval of watering should be longer, once a week or two
