The unique musical instruments mentioned in the latest dev diary really excite me. But apart from Gu Zheng, there are a lot more interesting instruments that can stand for Chinese culture. As to the Zhou Dynasty, Bianzhong(sorry I just can't translate it into English, but basically it's a group of bells of different sizes, usually up to fifty bells or so) is the perfect instrument of Zhou. It is known for one of the oldest and most sophisticated musical instruments in the world and it's literally the national treasure of China. Hope you can add Bianzhong to Zhou. I know it will be difficult, but there are several imitations of the antiques and it will surely be cooool~.