Hi @Gigazelle --Thank you for your reply. Our problem come from a basic issue. A bad Tracking Code uses for the SEA, and not define on the marketing Channel Rules.have a Nice Day.

Hello--We find a huge traffic coming from haosou.com ( asian search engine) in our  First Touch Channel / Referring Domains.@Adobe, Have you define haosou.com as search Engine, or we must create a specific marketing Channel rules  with haosou.com as Natual Search engine ?Best Regards