An automatic driving system of agricultural machinery based on China's Beidou satellite navigation is exhibited at an application expo in Nanchang, Jiangxi on May 26, 2021. [Photo by Liu Zhankun/China News Service]

An unmanned test ship equipped with China's Beidou satellite navigation is seen at the expo in Nanchang, Jiangxi on May 26, 2021. [Photo by Liu Zhankun/China News Service]

A shared bike navigated by Beidou satellite is shown at the expo in Nanchang, Jiangx on May 26, 2021. [Photo by Liu Zhankun/China News Service]

A model of the Beidou satellite navigation system is seen at the expo in Nanchang, Jiangxi on May 26, 2021. [Photo by Liu Zhankun/China News Service]

Safety helmets with Beidou high-precision positioning function are seen at the expo in Nanchang, Jiangxi. [Photo by Liu Zhankun/China News Service]

A Beidou-based portable mobile emergency monitoring station is showcased at the expo in Nanchang, Jiangxi on May 26, 2021. [Photo by Liu Zhankun/China News Service]

Mobile phones supporting Beidou satellite navigation system are showcased at the expo in Nanchang, Jiangxi. [Photo by Liu Zhankun/China News Service]

A fixed-wing drone used Beidou satellite navigation is exhibited in Nanchang, Jiangxi on May 26, 2021. [Photo by Liu Zhankun/China News Service]

A watch equipped with Beidou satellite navigation system debuts at the expo in Nanchang, Jiangxi. [Photo by Liu Zhankun/China News Service]