The unglazed base is smooth like jade. It has three old hairlines and two old repaired chips on the rim - interestingly the repair was done with gold - meaning this was a very important vase when repaired. This is clearly an antique vase. Its very difficult to determine if its mark and period, but it definitely looks like it might be - and if not, its close.
The item "9 1/8 Chinese Porcelain Wucai Gu Vase Children Playing Wanli Mark" is in sale since Sunday, September 3, 2017. This item is in the category "Antiques\Asian Antiques\China\Vases". The seller is "avionsunantiques" and is located in Victoria, British Columbia. This item can be shipped worldwide.