On February 1, the Mineral Resources Exploration and Development Office of Hainan Province announced that four mining rights, including Hechaling Limestone Mine in Bangxi Town, Baisha County, Yangpu Jinye Industrial Co., Ltd., were about to expire, reminding mining rights holders to apply for renewal of mining rights within 60 days and 30 days before the expiration of the validity period. The mining rights that will expire in April
2023 are as follows: