Speaking at a daily news briefing, foreign ministry spokesman Lu Kang said the government had been continually informing the United Nations space agency of the latest information about the Tiangong-1.
The re-entry area covers huge parts of the Earth's oceans, so any surviving pieces of the space station are most likely to end up at the bottom of the sea.
CHINESE space station Tiangong-1 is plummeting towards Earth and is expected to hit on Monday but the latest predictions have indicated it could hit the hermit kingdom of North Korea, it has been revealed.
"Although not declared officially, it is suspected that control of tiangong-1 was lost and will not be regained before re-entry", says The Aerospace Corporation.
Russia, Canada and northern Europe are all reported to be out of range.
Chances of the Tiangong-1 hitting someone on Earth is microscopic. Anyone who suspects they have encountered debris from the space station should report it by calling 911 and stay at least 150 feet away from it. Last year, Chinese officials confirmed Tiangong-1 - Chinese for Heavenly Place - would have an uncontrolled entry into the Earth's atmosphere this spring, setting off the space watch for the object.
China had said its re-entry into Earth's atmosphere would happen in late 2017 but that process was delayed, leading some experts to suggest the space laboratory was out of control.More news: Christopher Nolan's visit to India: All you need to know
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"This is a big thing the size of a school bus". "We have been able to confirm that there is a tumble, we just can't tell the orientation".
While it is not uncommon for debris such as satellites or spent rocket stages to fall to Earth, large vessels capable of supporting human life are rarer.
On Twitter, there are several experts keeping regular tabs on the Chinese space station, including Jonathan McDowell, an astronomer at the Harvard-Smithsonian Center for Astrophysics.
Where will the Chinese space station land?
"I think we will have our first environmental superfund site in Earth orbit in the next decade given the amount of debris that is there right now and the projected increase of objects in the coming years due to cheap access to space", Reddy said. The station played host to two crewed missions and served as a test platform for perfecting docking procedures and other operations.
Tiangong-1 was China's first prototype space station.
China also plans to put a man on the moon and send a rover to Mars.