Veins left by the tide form some distinct shapes at the shoal of Xiaoyangkou in Nantong’s Rudong county, Jiangsu province, late last month. [Photos/VCG]

Veins left by the tide form some distinct shapes at the shoal of Xiaoyangkou in Nantong’s Rudong county, Jiangsu province, late last month. [Photos/VCG]

Veins left by the tide form some distinct shapes at the shoal of Xiaoyangkou in Nantong’s Rudong county, Jiangsu province, late last month. [Photos/VCG]

Veins left by the tide form some distinct shapes at the shoal of Xiaoyangkou in Nantong’s Rudong county, Jiangsu province, late last month. [Photos/VCG]