There is a video that accompanies this tweet, that includes a missile firing footage allegedly of the CJ-100. But the launch is fired from a slanted position and the missile doesn't go straight up. Either the missile firing sequence is merely common stock footage from another cruise missile, or the missile in the previous post is a new SAM that is still being developed that is akin to the SM-3 or SM-6.
CJ-100：第3世代超音速巡航ミサイル、防御突破能力と命中精度が高いロケット軍の要害攻撃の「切り札」の一環、また他のミサイルと補足し、高・中・低三つの防御突破体系を作り上げる。
Translated from Japanese by
CJ-100: 3rd generation supersonic cruise missile, a part of the “trump” of the rocket army's destructive attack with high defensive breakthrough capability and high accuracy, and supplement with other missiles, high, medium and low defensive breakthrough system Make up.
