Flow Logs service itself is free of charge, but the data stored in CLS is charged according to the standards set for CLS.
Hong Kong, China
+852 800-964-163 (Toll Free)
+1 888-652-2736 (Toll Free)
+82 080-899-3166 (Toll Free; local time：9:00—12:00, 13：00-18:00)
Local hotline to be supported for more regions