The nature of the testing, reported bye the local Center of Disease Control and Prevention (CDCP) is not specified so whether live virus was detected or viral nucleic acid is unclear. Finding influenza virus nucleic acids in the water of a live bird market in the current climate is not hard to believe - PCR being so sensitive and all - but whether it came from geese is not clear without more information.
There doesn't seem to be anything about this on the Animal Health's OIE latest disease alert list.
Disinfection of the market has been carried out and there is a suggestion that slaughtering of birds will occur soon.
Of course, FluTrackers had this a day ago!