From Parallel Waves or Parallel Inverted Lines.

Circulate; 1/2 Split Circulate; Centers Hinge, Box Circulate & Trade as the Ends Circulate twice (around the outside).

Parallel Waves end in Parallel Two-Faced Lines.

起始于 Parallel Waves:         Perk Up 之前   Circulate 之后   1/2 Split Circulate 之后   after Ends Circulate twice 同时 Centers Hinge, Circulate & Trade (完成)

起始于 Parallel Inverted Lines:         Perk Up 之前   Circulate 之后   1/2 Split Circulate 之后   after Ends Circulate twice 同时 Centers Hinge, Circulate & Trade (完成)

注意:

• For historical reasons, Perk Up may occasionally be called from an Eight Chain Thru. The first Circulate is a Pass Thru; the 1/2 Split Circulate is replaced with Outsides 1/4 Right (or as directed) as Centers 1/2 Circulate (Touch). We believe this usage should be avoided.
• Dancers often confuse Perk Up with Percolate [C1] since both calls sound similar and start with a Circulate. In order to help other dancers within the square, some dancers yell 'Up' for Perk Up and 'O-Late' for Percolate.

anything Perk Up [C2]: Do the anything call; then Finish Perk Up (1/2 Split Circulate; Center Line Hinge, Circulate & Trade as Others (Concentric) Circulate twice). Usually ends in Parallel Two-Faced Lines. The anything call replaces the first Circulate.

参见 anything Coordinate | Motivate | Percolate | Perk Up [C2].