Chinese researchers have offered a countermeasure: strike the weak flank. Although the bomb’s nose armour is thick, its steel sides are thin and measure just a few centimetres, meaning one or two anti-aircraft shells could crack it open. How to stop US bunker busters?
https://www.scmp.com/news/china/science/article/3318518/how-stop-us-bunker-busters-chinese-scientists-have-idea?