CREATE TABLE table_61717 ("Romanised name" TEXT, "Chinese name" TEXT, "age at appointment" FLOAT, "Foreign nationality" TEXT, "Portfolio attachment" TEXT, "Govt salary" TEXT)

What is the portfolio attachment of the Undersecretary appointed at age 48 with a Chinese name of ?
SELECT "Portfolio attachment" FROM table_61717 WHERE "age at appointment" = '48' AND "Chinese name" = '梁鳳儀'
SELECT "Portfolio attachment" FROM "table_61717" WHERE "Chinese name" = '梁鳳儀' AND "age at appointment" = '48'