Strategically it wouldn't make sense. South Korea shouldn't do that because the US is their defense umbrella and helping China in such a manner would go against the spirit of that pact, de facto helping to undermine the containment system being placed on China by the West.
so true. Aside from SK's geopolitical alliance with the US, South Korea has so much to gain from the West's banishment of China than anyone else. The current situation between the West vs China is the best thing happened to South Korea since the Japan-US trade war that helped SK's semiconductor manufacturing industry get their foot in the door and eventually surpass all their Japanese rivals in the 80's and 90's.
