Table: ittf_pro_tour_winners
Columns: year_location
mens_singles
womens_singles
mens_doubles
womens_doubles

Question: How many  year locations are there for the womens doubles in jing junhong li jiawei?
SQL: SELECT COUNT("year_location") FROM ittf_pro_tour_winners WHERE "womens_doubles" = 'Jing Junhong Li Jiawei'

Question: How many players are there for mens singles when chen qi ma lin played mens doubles?
SQL: SELECT COUNT("mens_singles") FROM ittf_pro_tour_winners WHERE "mens_doubles" = 'Chen Qi Ma Lin'

Question: Who played mens doubles for the 1999 kobe tour?
SQL: SELECT "mens_doubles" FROM ittf_pro_tour_winners WHERE "year_location" = '1999 Kobe'

Question: Where was the tour when  jing junhong li jiawei played womens doubles?
SQL: SELECT "year_location" FROM ittf_pro_tour_winners WHERE "womens_doubles" = 'Jing Junhong Li Jiawei'

Question: How many years did lin gaoyuan wu jiaji play  mens doubles?
SQL: SELECT COUNT("year_location") FROM ittf_pro_tour_winners WHERE "mens_doubles" = 'Lin Gaoyuan Wu Jiaji'

Question: How many people are shown for mens doubles when guo yue played womens singles?
SQL: SELECT COUNT("mens_doubles") FROM ittf_pro_tour_winners WHERE "womens_singles" = 'Guo Yue'