On December 25, 2018, our technical staff went to ningxia petrochemical company of China national petroleum corporation (hereinafter referred to as

On May 23, 2019, our technicians went to xi 'an shaanxi drum power co., LTD. (hereinafter referred to as

On November 12, 2018, our technical staff and MANTURBO manufacturer went to shaanxi shannghua coal chemical group co., LTD. (hereinafter referred to as

On September 19, 2018, our technical staff and Ingersoll rand factory service engineers went to changqing petrochemical company of China national petroleum corporation (hereinafter referred to as

In July 2019, shaanxi shanhua coal and chemical industry group co., LTD. (hereinafter referred to as

On July 22, 2019, ningxia hanas liquefied natural gas co., LTD. (hereinafter referred to as