The second launch of China's heaviest satellite launch vehicle, the Long March-5 on Sunday evening has failed according to officials.
The rocket was launched at 7.23 pm (local time) and it was then that the abnormality arose which led to the failure of the mission.
It was not clear from the live broadcast whether anything had gone wrong. It is not clear how the timetable for that mission will be affected by the failed launch.
Last month China successfully launched the Long March-4B, its first X-ray space telescope to study black holes, pulsars and gamma-ray bursts.
It said the satellite will operate on geosynchronous orbit and provide communications services over China's territory - boosting internet access and providing access to more television channels. Details of the failure were not immediately available.
The launch was the final scheduled test for the Long March-5 series before it will send the Chang'e-5 lunar probe into space in the second half of the year.
The Long March-5 Y2 was fuelled with liquid hydrogen, kerosene and liquid oxygen and the process of filling propellant reportedly began from Saturday.
Long March-5 Y2 is created to carry up to 25 tons of payload into low orbit, which makes it the second most powerful rocket in the world after the United State's Delta IV Heavy.
And in April, the country's first cargo spacecraft completed docking with an orbiting space lab - a key step toward China's goal of having a crewed space station by 2022.