Tianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd. wishes everyone a happy International Labor Day!
Tianjin Yuantai Derun Steel Pipe Manufacturing Group Co., Ltd. wishes everyone a happy International Labor Day!
International Labor Day, also known as "May Day", is a national holiday in over 80 countries around the world, scheduled on May 1st every year. It is a holiday shared by working people around the world. Pay tribute to every ordinary person who strives hard