Table schema:
CREATE TABLE table_name_23 (span_metres INTEGER, span_feet VARCHAR, rank VARCHAR, year_opened VARCHAR, country VARCHAR)

Question: What is the lowest amount of Span metres when the year opened is 2007, the country is China, rank is less than 13, and the span feet is less than 1378?
SQL: SELECT MIN(span_metres) FROM table_name_23 WHERE year_opened = "2007" AND country = "china" AND rank < 13 AND span_feet < 1378