Picture dated 02 October 1998 shows four types of [Getty Images]

TAIPEI, TAIWAN - AUGUST 6: Picture dated 02 October 1998 shows four types of Taiwan's second generation air force fleet, (from L to R), French-made Mirage 2000-5, locally-made IDF (Indigenous Defense Figher), E-2T early warning system and US-made F-16. Taiwan's air force authorities have asked nationalist pilots to impose self-restraint to avoid clashing with Chinese jets over the Taiwan Strait amid cross-strait military tensions. AFP PHOTO (Photo credit should read JAMES HUANG/AFP via Getty Images)

AFP JAMES HUANG