Does Langfang Dachang Kyocera belong to state-owned enterprises?

Don't belong. According to Beijing Magnetic Information of Langfang Dachang, it is not a state-owned enterprise. Because it is a joint-stock liability company. Kyocera Materials Technology Co., Ltd. was established in 2003, and is one of the largest and leading manufacturers of sintered NdFeB permanent magnet materials in China.