The price of 439 euros is too expensive. Now they also sell the radiator alone, named the heart. The price has dropped to 180 euros, which is still 1388 yuan.
The reason why the heat sink is so heavy is for better passive cooling effect. Without fans, the cooling effect is positively related to the volume, and their goal is to suppress high-end CPU and GPU. Previously, they said that they should deal with GTX 1080 graphics card and core i7-8700k processor.
The actual measurement is not so good. The website of overclock uses core i5-9400f and GTX 1070 graphics card to verify that the CPU temperature is about 50 & deg; C, and the graphics card temperature is about 70 & deg; C.