Following is sample code:
DATA: LV_UNICODE TYPE STRING, "Unicode strings
LV_CHINESE TYPE STRING. "Converted Chinese string
DATA:. LT_TABLE TYPE TABLE OF CHAR04 the "inner split Unicode string
LV_UNICODE = '\u6fb3\u5927\u5229\u4e9a\u897f\u90e8\u6d77\u57df'.
SPLIT LV_UNICODE AT '\u' INTO TABLE LT_TABLE.
CLEAR: LV_CHINESE.
LOOP AT LT_TABLE INTO DATA(LS_TABLE).
IF STRLEN( LS_TABLE ) = 4.
TRANSLATE LS_TABLE TO UPPER CASE.
LV_CHINESE = LV_CHINESE && CL_ABAP_CONV_IN_CE=>UCCP( LS_TABLE ).
ENDIF.
ENDLOOP.
WRITE: LV_CHINESE.
Output: Western Australian waters