China don't really need a large strategic bomber. Modern day warfare is increasingly making the importance of strategic bombers an obsolete unfeasible concept in the face of advancement of drone technology. US is also reviewing its next gen bomber plans. Large drones will replace bombers in conventional warfare while missiles will remain an effective system of Nuclear war head delivery.
US is not reviewing any of its plans, they are already designing their next gen bomber, so is Russia, and the Chinese have been trying to develop a potent bomber aircraft since decades, and they are still continuing their effort, and the Chinese military strategic planners beg to differ here, they are very much pursuing the development of bomber; so no-- no one is abandoning the development of bombers neither the concept of bombers is outdated.
Missiles serve a completely different purpose than bombers, understand the difference first.