CREATE TABLE table_64821 ("Name  ( pinyin ) " TEXT, "Name  ( Wade Giles ) " TEXT, "Characters" TEXT, "Type" TEXT, "Construction" TEXT)

which Construction is named heng-hai?
SELECT "Construction" FROM table_64821 WHERE "Name (Wade Giles)" = 'heng-hai'
SELECT "Construction" FROM "table_64821" WHERE "Name (Wade Giles)" = 'heng-hai'