It's beautifully made!
However, I would like to make a small correction: the fishing island should be in CQ Zone 24. The CQ zone is based on DXCC standards, but the distance between the fishing island and its associated landmass does not meet the requirements for an independent DXCC station. Therefore, it should be calculated according to the distance to its associated landmass.
According to the Chinese perspective, the relevant land portion typically refers to Taiwan Island, which should be classified as part of CQ 24. (Some Japanese maps classify the Senkaku Islands as belonging to zone 25, according to the Japanese viewpoint.)
Dongsha Island meets the criteria for independent DXCC status, and CQ zone clearly defines the division of CQ Zone 24.
The Nansha and Xisha Islands meet the criteria for independent DXCC status, and CQ zone clearly defines a division within CQ Zone 26.
The Huangyan Island meets the criteria for independent DXCC status, and has a clearly defined CQ zone that includes CQ Zone 27.
You can refer to the solutions I wrote for the new problem set:https://exam.bh5hsu.com/question/MC1-0244
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