I think the real question given the facts around this is whether South East Asia will look to protect against a future failure by providing new routes that circumvent single points of failure such as the Luzon straights at Taiwan. But that costs a lot of money .. so the futures not hopeful!
In addition to the existing (fairly new) Rostelekom fiber vie Heihe, there is a new 10G fiber build by China Unicom and the Russian company TTC. On the Russian side, TTC is a fully owned subsidiary of the Russian Railways which means that they have full access to Russia's extensive rail network rights-of-way. Russia is a huge country and except for a small are in the west (known as continental Europe) the rail network is the main means of transport. It's a bit like the excellent European railways except with huge railcars like in North America. I think that TTC will become the main land route from the far East into Europe because of this. Compare this map of the Trans-Baikal region railroad with the Google satellite images of the area. http://branch.rzd.ru/wps/PA_1_0_M1/FileDownload?vp=2&col_id=121&id=9173 The Unicom/TTC project is coming across the Chinese border on the second spur from the lower right corner. It's actually a cross-border line, the map just doesn't show the Chinese railways. If you go to the 7th level of zoom-in on Google Maps, the first Russian town that shows on the Chinese border (Blagoveshchensk) is where the fibre line will cross. --Michael Dillon