D4D on the magazine: CQ Communication Today online magazine in China
D4D was introduced by BG2KAJ, the ex-editor for CQ Communication Today magazine in China, equivalent to CQ or QST in USA. The introduction attracted many domestic hams. He wrote, no matter it is for hands-on experience improvement or QRP culture popularization, this kit is a good chance to try.
Use google translation to read this review article in Chinese: