The project has experienced several delays, the latest one was attributed to the fact that the Chinese contractor has not provided certificates and documents for independent foreign experts to peruse and evaluate the system’s security.

If all goes well, the metro line should begin commercial operation by the end of next month, according to Hanoi's mayor.

The trial operation of Hanoi’s first metro line has to be carried out by Chinese experts who have not come back from the Lunar New Year holiday.

The Chinese government is closely monitoring the construction progress of Cat Linh – Ha Dong project, said Chinese Ambassador to Vietnam Xiong Bo.

If flights between Vietnam and France are still suspended, the French experts would fly to Vietnam via a third country.