Few pieces of saltwater carry more strategic weight than the Strait of Malacca. The 800 km channel between Malaysia and Sumatra connects the Indian and Pacific Oceans, narrows to about 1.7 miles at the Phillips Channel near Singapore, and is the route for roughly a quarter of all globally traded goods. About 80 % of China's seaborne energy imports transit it.

The "Malacca dilemma"

The phrase comes from Chinese strategic writing in the 2000s — a recognition that an adversary capable of closing or interdicting the strait could choke Chinese industrial supply within weeks. Beijing's responses over the last two decades read directly off this concern:

• Pipeline alternatives. The China-Myanmar oil and gas pipelines, completed 2013–2017, route Middle Eastern crude through Kyaukphyu port and over the Yunnan border, bypassing the strait for ~22 million tonnes of oil per year.
• Port investment. Equity stakes in Gwadar (Pakistan), Hambantota (Sri Lanka), Kyaukphyu (Myanmar), and several East African ports give China alternative offload points and naval-logistics nodes.
• Naval expansion. The PLA Navy's blue-water ambition — carrier groups, large amphibious platforms, deployed bases like Djibouti — is partly a long-running answer to the same chokepoint question.

Why the strait still wins

Pipelines have throughput limits. The combined Myanmar pipelines move under 5 % of China's annual oil imports. The Kra Canal proposal across the Thai isthmus — periodically revived since the 19th century — would shave only ~1,200 km off Persian Gulf-to-Shanghai routes, marginal economics against tens of billions in construction cost and Thai sovereignty objections.

The cheaper, more probable adaptation is operational rather than geographic: positioning fuel reserves, diversifying flags-of-convenience, and developing the long-range strike and submarine capabilities that would deter any blockade rather than route around it.

The other end of the strait

Singapore plays an asymmetric role. Its bunkering and port-services industry depends on strait traffic continuing exactly as it does. Singaporean foreign policy — independent, hedging, careful about taking sides between great powers — is underwritten by that economic geometry. A US base would risk strait-closing scenarios; a Chinese base, the same in reverse. Singapore's value is that it hosts neither.