Table: cheah_soon_kit_tournaments
Columns: outcome
year
tournament
partner
opponent

Question: Who was Choong Tan Fook's opponent in 1999?
SQL: SELECT "opponent" FROM cheah_soon_kit_tournaments WHERE "year" = 1999 AND "partner" = 'choong tan fook'

Question: Which opponent played in the Chinese Taipei Open in 2000?
SQL: SELECT "opponent" FROM cheah_soon_kit_tournaments WHERE "tournament" = 'chinese taipei open' AND "year" = 2000