Table 6. Analysis results of air trade with China

Variable	Export amount	Import amount	Trade amount
ln_cgdp	(+)	(−)	(+)
ln_cpergdp	(−)	(+)	(−)
ln_kgdp	(−)	(+)	(−)
ln_kpergdp	(+)	(+)	(+)
ln_exchanges	(−)	(+)	(+)
ln_oil	(−)	(+)	(−)
ln_ctariff	(+)	(−)	(+)
ln_ktariff	(−)	(−)	(−)
FTA	(−)	(+)	(+)