2018年美国年报(20-F) (XBRL)
- XBRL INSTANCE DOCUMENT - EX-101.INS
- XBRL TAXONOMY EXTENSION SCHEMA - EX-101.SCH
- XBRL TAXONOMY EXTENSION CALCULATION LINKBASE - EX-101.CAL
- XBRL TAXONOMY EXTENSION DEFINITION LINKBASE - EX-101.DEF
- XBRL TAXONOMY EXTENSION LABEL LINKBASE - EX-101.LAB
- XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE - EX-101.PRE