Borrowings (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Short-term Loans

	March 31,		December 31,
	2019		2018
	US$		US$
Unsecured loans		394,064,008		418,198,508
Loans secured by accounts receivable		66,830,029		65,567,082
Loans secured by restricted cash		84,351,118		69,500,000
Current portion of long-term bank loans (note b)		178,057,193		176,401,330
Total short-term loans, including current portion of long-term bank loans		723,302,348		729,666,920

Schedule of Long-Term Debt

	March 31, 2019			December 31, 2018
	US$			US$
Secured loans		76,433,573			2,177,985
Unsecured loans		199,807,529			196,031,589
Syndicate loan facility		90,000,000			90,000,000
Less: current portion		(178,057,193	)		(176,401,330	)
Total long-term bank loans, excluding current portion		188,183,909			111,808,244

Maturities on long-term bank loans

Maturities on long-term bank loans (including current portion) are as follows:

	March 31, 2019
	US$
2019		178,057,193
2020		24,939,940
2021		95,482,749
2022		27,167,609
After 2022		40,593,611
Total		366,241,102