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Lines of credit and loan facilities	12 Months Ended
Lines of credit and loan facilities	Dec. 31, 2019
Lines of credit and loan facilities
Lines of credit and loan facilities	3 3 . Lines of credit and loan facilities As of December 31, 2019, the Group had agreements with China commercial banks for unsecured revolving lines of credit, and increased its revolving lines of credit to RMB75,337,037. The Group was in compliance with the financial covenants, if any, under those lines of credit as of December 31, 2019. As of December 31, 2019, under the lines of credit, the Group had RMB23,297,902 reserved for the issuance of bank acceptance and RMB995,014 reserved for the bank guarantee. In December 2017, the Group entered into a 5-year US$1,000,000 term and revolving credit facilities agreement with a group of 24 arrangers. The facilities were priced at 115 basis points over London Interbank Offered Rate. The use of proceeds of the facilities was intended for general corporate purposes. In June 2018, the Group drew down US$450,000 under the facility commitment, and the borrowings will be due in 2022, which were recorded in long-term borrowings in the consolidated balance sheets. As of December 31, 2019, the Group had an undrawn balance of US$550,000 under the credit facilities agreement, with a commitment fee of 0.2% per annum on the undrawn portion, which will expire one month prior to the final maturity date, which is sixty months after the date of this credit facilities agreement. As of December 31, 2019, the aggregate amounts repayable within a period of more than two years but not exceeding five years was US $450,000.