9 Carriers sounds like complete bogus, unless they are including ships such as the Type 076 as carrier ships. Then it sounds actually feasible.
I think it is feasible.
1. Currently under construction. 1 nuclear carrier and 1 conventional carrier. Should be launched by 2027/2028
2. Then in the 2031-2035 timeframe, both Dalian and Jiangnan build 2 carriers each. Call it a module assembly time of 2 years for a single carrier, given that mature designs should be available.
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If China has 9 carriers after 2035, consider how the strategic environment completely changes.
The Chinese military would likely win blue-water naval battles to a distance of 3000-4000km (which is within range of supporting land-based missiles and aircraft). That covers the Second Island Chain and the Malacca Straits for example. It means:
1. Mainland China is secure from external attack
2. China can secure the seaborne trade routes between China - South China Seas - Malacca Straits - Indian Ocean - Persian Gulf. Maybe even to the Red Sea and the Suez Canal
3. The Chinese military can prevent the US reaching and resupplying the Western Pacific. Where does that leave Taiwan, Philippines, Japan and Korea?
This would provoke a fundamental reassessment on having a military alliance with the US.
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Of course, what is happening in the economic realm is arguably even more important, given that China would prefer to avoid a war.
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As noted Japanese nationalist Shintaro Ishihara once said, if China becomes wealthy and technologically developed, Japan will have no choice but to ditch the USA and recognise China as senpai.
Lee Kuan Yew also foresaw that the day when China would dominate SE Asia from both a military and economic perspective.
And that Singapore (along with the rest of ASEAN) would have to adapt to such a change.