G Key Nan Xiao - Southern Xiao Flute by Xie Bing

Quality looks good; minor scratch on thumb hole but nothing significant. I am an amateur flutist and xiao player, but I can come close to getting most notes in tune from D4-E6 (SPN); a couple are a bit tricky. Only odd note is lower C . Even though note is in tune, the timbre and sonority of C sounds odd to me--hard to explain (I can use slight alternate fingering to get a sound I "like" better). I was going to say the C# is flat--but when double checking was able to get an exact C#; hard to say if flute or flutist at this point without a comparison.