A customer uses Alibaba Cloud Auto Scaling service and creates a scaling group. They set the "Minimum number of instances" to 6 and the "Maximum number of instances" to 8. After correctly configuring scaling settings, the customer adds a scaling rule "Adjust to 10 ECS instances" and creates a scheduled task based on this rule. Then, the customer checks the scaling group and sees it already contains 6 valid ECS instances.
They then enable this scaling group immediately. How many ECS instances will be in the scaling group when the scheduled task is activated once?