科學家Sean wrote:好奇後面的建築頗特別...(恕刪) Hi, there is Guangzhou BaiYun International Conference Center.I am working at Guangzhou.Thank you.
I bought two used B+W filters,NL4 and NL5It was so hard to find,AML-1 is so expensiveHere are the pictures from sellerNL4NL5