HALF CIRCLE FORWARD + ATTACK
Chun-Li's fireballs come out slower than most fireballs. The strength of the attack button that you use determines the fireball's characteristics. The light attack button's fireball goes the farthest but it is also the slowest version. The hard atack fireball is the fastest but does not go very far. Fairly poor as a projectile, but it does have some use in baroque and assist combos.
HYAKURETSU KYAKU (LIGHTNING LEGS)
TAP RAPIDLY (can be used in the air)
The light attack version of lightning legs will continue until you stop mashing the button. The medium and hard attack versions will work in bursts which stop for a moment before resuming but do more damage. This is one of Chun Li's most useful specials. It has almost no startup and lag, so it can be used to get her out of many dangerous situations. It is also her primary method of combatting giant characters as it keeps them locked in their super armor for some time, allowing her to call in a tekkaman assist to pull them off the ground and into her re-jump loop for huge damage.
TENSHOU KYAKU (SKY KICK) (can be used in the air)
FORWARD DOWN DOWN-FORWARD + ATTACK
This move makes Chun-Li perform a series of diagonal kicks as she flies upward. Can be used as an anti-air, but is not as effective as other dragon-punch style anti-air attacks. It does decent damage and is not significantly affected by damage scaling, so it makes a good combo ender. The attack button used determines the number of hits and damage.
SPINNING BIRD KICK (can be used in the air)
CHARE DOWN, UP + ATTACK
Another of Chun-Li's signiture moves. As she jumps over someone she can stomp on their head with her foot and follow-up with an attack. If there is no follow up, she will bounce safely to the other side of the opponent.