evidence: Macclesfield Bank is an elongated sunken atoll of underwater reefs and shoals in the South China Sea. It lies east of the Paracel Islands, southwest of the Pratas Islands and north of the Spratly Islands. Its length exceeds 130 km (81 mi) southwest-northeast, with a maximal width of more than 70 km (43 mi). With an ocean area of 6,448 km2 (2,490 sq mi) within the outer rim of the reef,[3] although completely submerged without any emergent cays or islets, it is one of the largest atolls of the world.[4] The Macclesfield Bank is part of what the PRC call the Zhongsha Islands, which includes a number of geographically separate submarine features, and also refers to a county-level administrative division. [...] The broken coral reef rim of Macclesfield Bank, with a width of up to 8 km (5 mi), has depths of 11.8 m (39 ft) at Pygmy Shoal on the northeast end of the bank and depths of 11.6 to 18 m (59 ft) elsewhere. Within the lagoon, Walker Shoal marks the least known depth of 9.2 metres (30 ft). In general, the central lagoon is very deep, with depths up to 100 metres (330 ft).[3] [...] Macclesfield Bank is claimed, in whole or in part, by China[8] and Taiwan (Republic of China).[9][10]