China is "willing to work with related countries to find out the truth", Foreign Ministry spokeswoman Mao Ning said in Beijing.
China and Sweden are in close contact regarding the matter, she said.
The authorities of several countries are investigating the role of the Chinese cargo ship Yi Peng 3 in the case.
Sweden requested that the cargo ship enter its waters for investigation.
Swedish Prime Minister Ulf Kristersson said at this stage there are no accusations against anyone.
The Yi Peng 3, which belongs to a Chinese shipping company, continues to lie in the Kattegat waterway between Denmark and Sweden, currently flanked by a Danish and a German patrol ship.
Two communication cables between Helsinki and the northern German city of Rostock and between Sweden and Lithuania were damaged shortly after each other about a week-and-a-half ago.
The Swedish authorities are investigating possible sabotage.
Investigators have completed on-site investigations at the affected locations and have begun their analysis.
The Swedish-Lithuanian connection has been restored while the cable between Helsinki and Rostock is scheduled to be repaired by the end of the month.
The period since Russia's full-fledged invasion of Ukraine in February 2022 has seen heightened tension in the Baltic Sea and a number of incidents involving damage to undersea infrastructure.
In September 2022, a series of explosions blew holes in the two Nord Stream gas pipelines between western Europe and Russia, and in October 2023 damage was done to an undersea telecoms cable between Estonia and Sweden.
with Reuters
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