When the opponent was Yan Zi Jie Zheng, what was the outcome?
CREATE TABLE "doubles_7_5_titles_2_runners_up" (
  "outcome" text,
  "year" real,
  "championship" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT "outcome" FROM "doubles_7_5_titles_2_runners_up" WHERE "opponents"='Yan Zi Jie Zheng';