My comment: Why would China buy S-400 missiles, when China can can intercept a missile with a missile, which is the hoped-for function of s-500 (that is right, 500--the next-generation missile that has not come to existence yet).
(2) Wendell Minnick, Taiwan To Receive New Aircraft To Repel China. Defense News, Feb 20, 2013 http://www.defensenews.com/artic ... ircraft-Repel-China
("Taiwan appears to have given up on new F-16 fighters, settling instead for an upgrade of older F-16A/B Block 20s. This has caused some consternation among supporters of the F-16 sale to Taiwan in Congress; the sale is now blocked by the US State Department")
My comment:
(a) There s no need to read the rest, which reports that Taiwan is due to receive this year more than a hundred aircraft ordered years ago.