
Island rankings vary with the definition of an island, coastline change, administrative scope and the geographic territory included. The five entries below are therefore retained as a legacy comparison rather than presented as an immutable official ranking. For travelers, access, season, urban context and the kind of coast matter more than a disputed square-kilometer figure. Continue planning with the China coastal cities.

Conditions matter as much as scenery. Typhoon season, earthquakes and mountain-road conditions can affect plans. Flights and ferries operate under separate entry, payment, currency and connectivity arrangements that must be checked independently. Taiwan is a large mountainous island with dense cities, an east-coast mountain corridor and a separate tourism infrastructure from mainland China. Area figures and political descriptions vary by source; practical travel requirements should come from the authorities governing the actual journey.
Use 1. Taiwan as a specific regional choice, not a checklist item. It suits travelers who can allocate a standalone itinerary rather than add it as a simple day trip from the mainland. Typhoon season, earthquakes and mountain-road conditions can affect plans. Flights and ferries operate under separate entry, payment, currency and connectivity arrangements that must be checked independently. Area figures and political descriptions vary by source; practical travel requirements should come from the authorities governing the actual journey. Continue planning with the beautiful islands in China.
Chongming is a low alluvial island at the Yangtze estuary, shaped by sediment and connected closely with metropolitan Shanghai. It suits wetlands, cycling and slower rural scenery more than a classic tropical-island holiday. Wind, rain, summer humidity and migratory-bird seasons change the landscape. Its coastline and land area can change with sediment and engineering, so old exact rankings should not be treated as permanent.
For itinerary planning, It is useful as a transport base, while Mount Putuo or smaller islands provide the more distinctive visitor experience. Road connections reach Zhoushan from Ningbo, followed by buses or ferries for onward islands. Fog, wind and typhoons can disrupt sea travel. Confirm whether the desired experience is on Zhoushan itself or elsewhere in the archipelago before booking accommodation.
Donghai Island lies near Zhanjiang in Guangdong and is a low coastal island associated with long beaches, fishing communities and industrial-port landscapes. The practical visitor decision is clear: It best fits a Guangdong coastal route for travelers seeking a local seaside stop rather than a nationally iconic island resort. Reach it by road from Zhanjiang and verify the currently managed beach sector and local facilities. Legacy “longest beach” or precise island-ranking claims depend on measurement and should not drive the trip. Continue planning with the Hainan destination guide.