Myanmar’s government is reviewing a $9bn deepwater port project backed by China over concerns it is too expensive and could ultimately fall under Beijing’s control if Myanmar were to default on its debt.

Two people with direct knowledge of the discussions within Aung San Suu Kyi’s government said that economic officials were looking for ways to negotiate down costs for the planned port at Kyaukpyu in Myanmar’s western Rakhine state.

The port is set to give China’s south-west a direct trading corridor to the Indian Ocean via Myanmar, allowing companies to avoid the Malacca Straits if needed. As such, it is part of Beijing’s $1tn push to shore up transport and energy supply routes across Eurasia under its so-called Belt and Road Initiative. The port at Kyaukpyu will be one of the biggest infrastructure projects in Myanmar’s history.