China is surrounded by many nations that are opposed to any move on China's part to violate their economic zones (200-mile). China is a nation that does not possess much open, unfettered access to the sea. This is a reality that they must recognize, acknowledge and accept. Their own coastal economic zone intersects with those of Korea, Taiwan, Japan, Vietnam, Philippines, Malaysia, Indonesia and tiny but wealthy Brunei and Singapore. Just east of China in the Pacific is Guam, and the vast expanse U.S. Pacific Territories, as well as the Federated States of Micronesia.
In the sense of being "landlocked", China is truly "sea locked". It has, really, only a 200-mile coastal zone with little or no open access to the Pacific, because of the complexity of it's proximity to other nations and the adjacent sectors of the Pacific. This is what geology has bequeathed it.
Unlike the USA, Canada (both with unfettered oceanic seaboards on both sides; Pacific AND Atlantic), and other nations like Chile, Argentina, Brazil, India, Australia, South Africa, other African nations, United Kingdom, Norway, Iceland and even Mexico and Peru, China must observe the realities of it's relationship to the ocean. It is in fact, making many mistakes right now by building up a large, potent navy. What for?
One of the obvious, to the whole world, problems China may start is the situation in the Spratly Islands off the Philippines, Vietnam, Malaysia and Indonesia. These waters are not at all part of China's economic zone or near it's coastal waters, but wholly shared by the four nations mentioned above. To attempt to "flex" it's might in naval terms there would be a gross violation of the sovereign maritime economic zones of those nations - nothing short of an act of naked aggression in full disregard of those nations and their regional integrity. It would be belligerent aggression intent on illegal annexation of the physical territory/maritime economic zone of other nations.
The Paracel Islands that are equally shared by Vietnam and China (by virtue of Hainan) are another "hotspot" where China may simply imagine that it belongs to China alone. But this would be incorrect; it is equally in proximity to Vietnam as it is to Hainan Island. Therefore, Vietnam has equal jurisdiction of the Islands, and therefore the "ownership" of those islands should be bisected equally between China and Vietnam. It is obviously an simple matter; but China may turn it into a complicated one.
China's behavior is beginning to indicate trouble ahead; observe it's displeasure regarding it's restricted lanes connecting it to the Pacific high seas through Taiwan and Japan's territorial maritime zones. This is an irritant to China. It's shipping has to pass through the two nation's maritime zones, before China's shipping can reach it's own Pacific maritime zone. This is something China must simply recognize and acknowledge. They are nearly on the verge of announcing that it has the right to change these physical facts by ignoring it and taking control of it by might (naval might). To some degree, China also must respect the economic maritime zone of Korea by virtue of Korea's side of the Yellow Sea, which is really a gargantuan bay shared equally by Korea and China.
The so-named "East China Sea", is, like the "Sea of Japan", poorly termed. Just as the "Sea of Japan" should really be called the Korea-Japan Sea, the "East China Sea" is really something like the "Taichija Sea" (Taiwan-China-Japan Sea). Or perhaps it should not be called anything at all; for it is a sector of the Pacific that is shared by the coastlines of all three nations, and in fact, four, by virtue of Cheju-do island, Korea. This means that due to the physical reality of Cheju-do, a small sector of the "East China Sea" is actually Korea's economic maritime zone.
The "East China Sea" is very interesting. It is not the high seas; it is enclosed by and sectioned off from the Pacific high seas by Japan's Ryuku Island chain, and made into a small sea by the landmass of Taiwan. Taiwan, therefore, turns it into a "sea" that is "apart" from the Pacific Ocean.
All four nations equally share this sea.
There should really be no naval program there by any of the nations involved. They should really only be patrolling inside of their own 200-mile maritime economic zones. To practice any sort of naval maneuvers here is nothing short of idiotic. Four powerful modern nations each with vibrant economies to boast in their own rights all steaming around with navies in such confined, restricted waters where their economic maritime zones all converge almost immediately, simultaneously? China, Japan, Korea and Taiwan should convene and come to logical, rational, obvious conclusion and agreement over this sector of their shared interest in terms of shipping access and cooperative harmony. They need to; they have to.
China's naval buildup? It's posturing? It is rather a shame that China is building up such a navy. What for? It's truly ridiculous. What nation, or even nations, (who?) is going to threaten China, in any form or way whatsoever? Why, the answer is, nobody! China is simply being a nuisance right now in world affairs by wasting billions of it's financial resources by building a "built-up" navy.
Why does China need aircraft carrier(s)?! It's ridiculous, to put it mildly. The entire Pacific approach to it's national shores and coastline would be blanketed by it's land-based missiles and within range of it's modern aircraft. Nothing could nor will ever threaten it's coastline, economic maritime zone or it's territorial integrity. It's landmass not vast; it is immense. It is the world's fourth largest country. Bear in mind that this is in relation to Russia, Canada and the United States. It is almost exactly the same size as the United States - bear in mind that this includes Alaska! And it actually has MORE land than the United States, because a vast area of the United States is actually not land but water - in the form of the Great Lakes. China has the third AND sixth largest rivers of the world wholly inside it's borders. Three more of the world's 12 largest rivers are partly or mostly in China! One in every five human beings in the planet is Chinese!! And that is not including all of the Chinese persons all across the globe in the millions residing in other countries! China has a BILLION people, and then, ANOTHER THREE HUNDRED FORTY-FOUR MILLION people. That is over ONE BILLION people MORE than the ENTIRE population of the United States!!
Why does China, of all countries, need to build up a NAVY of all things. It is clear that China, among other reasons (by its leadership), is mainly "flexing" it's new found affluence and economic $$ power in the form of building up a navy. It would well serve itself by building more competitive trade shipping, rather than wasting it's time, resources and energy on military naval machinery and technology. If it's national security it's worried about, it may as well simply augment it's air force and land-based defense missile system - into what would essentially be the largest and most potent air system in the world.
CHINA?! Worried about IT'S national security? As if any nation or nation(s) could ever pose the most remote threat to China!!