Tā sǐshǒu jiù guānniàn, bù kěn jiēshòu xīn sīxiǎng.
He stubbornly clings to old ideas and refuses to accept new thinking.
Tips
usage
死守 can be used literally (defend a position to the death in battle) or figuratively (rigidly cling to a rule, belief, or habit). The figurative usage often carries a slightly negative tone.
