Outstanding international dollar-denominated bonds issued by Chinese companies will hit a peak of $46.9 billion in 2018, a report by data provider Dealogic showed has shown.

The continued depreciation of the renminbi has sparked concerns of growing debt burden of Chinese companies, in particular the country's property developers that are heavily reliant on foreign financing.

The real estate sector accounts for 74 percent of high-yield bonds due to mature through 2020 with $29.5 billion, with 2019 having the highest volume of $9.2 billion. Sectors of metal and steel, oil and gas follow with $3.1 billion and $1.2 billion, respectively, Thursday's report showed.

Some $179 billion worth of China's dollar-denominated bonds are due to mature through 2020, according to Dealogic.