There are a number of ways to ensure the first layer of your print sticks to the bed properly. Detailed tutorial & article at https://snapmaker.zendesk.com/hc/en-u...

After following the troubleshooting steps, if you find it difficult to resolve your issue, kindly submit a support ticket through https://snapmaker.formcrafts.com/support-ticket and share your troubleshooting results with some pictures/videos.