As China greets the May Day holiday, the first long holiday in 2023 after the seven-day Spring Festival holiday, many have taken the opportunity to relax or go on sightseeing trips. However, railroad engineer Sun Song has decided to remain at his post.

This is the eleventh May Day holiday that Sun has spent with his team of workers on the construction site of the Yuelongmen tunnel, a section of the Chengdu-Lanzhou Railway. Drilled through an area of extremely complex geological conditions, the tunnel was one of the hardest parts of the railway project, taking nearly 10 years to complete.

During the whole time, Sun and his colleagues made tremendous efforts to deal with unfavorable geological conditions like a seismic fracture zone and high ground temperatures. They are now preparing for the project's static acceptance, which brings them one step closer to the official opening.

"At this critical moment, we must ensure the safety and quality of the tunnel, to deliver a project that meets expectations and satisfies our conscience," said Sun.

China is observing International Workers' Day on Monday. It is a time when people honor diligent, hard-working people like Sun. To create better lives and promote the building of a modern socialist country in all respects, they devote themselves to their own professions and have achieved extraordinary results.