Recently, the National Audit Office issued an auditing notice that starting from this May, it would send auditing groups to conduct audits on the construction and management of the west-to-east gas transmission line II project (west section) contracted by China National Petroleum Corporation, and extend audits to relevant departments of governments in provinces, cities and districts along the construction line as well as other units such as engineering survey, design, construction, supervision, equipment and material supply, testing, quality supervision, etc.