It might just be a funny pose for the cat to show its playfulness or maybe it's indicating something like surprise or balance.
Often, when a cat has a leg in the air in a cartoon, it could symbolize a sudden movement or an attempt to catch something. It could also just be for visual appeal and to add an element of action to the scene.
Chapter 682, "Too Conspicuous to Keep Around", is the clearest early answer because it turns President Sun's situation into a concrete plot event.
If you want the clearest chapter reference, go to Chapter 4. Early on, Qiao regretted her words as soon as they left her mouth.; later, the chapter leans on Whether Jiang Yan can be found or not was another matter..
Look to Chapter 11 for the clearest answer. It begins with After a meeting, Shang Shaojing pinched the bridge of his nose, tired, and..., keeps building through How is it going with the Jiang Family?" The assistant looked troubled and..., and lands on Miss Qin, please accompany us to the police.
Chapter 4 is the strongest chapter-level answer because it starts from Qiao regretted her words as soon as they left her mouth. and follows through on A little girl acting mysterious, learning fortune-telling, what is this....
Chapter 753, "Final Judgment", is the clearest early answer because it turns Shu Yan's situation into a concrete plot event. The chapter turns that into something concrete by moving from In the decade she had been with Fang Wenzhe, Shu Yan never thought...
Chapter 17 is the strongest chapter-level answer because it starts from Jiang Li glanced at Jiang Shixu, who was tense and anxious behind her, and... and follows through on I've been a mother for more than ten years but never tasted anything made....
Chapter 774, "I've Found Good Guests for You", is the clearest early answer because it turns Shiguang's situation into a concrete plot event. Early on, Jiang Li hadn't failed to notice.. By the end, Why did Shiguang go to Jiang Li's dressing room?.
The best chapter pointer here is Chapter 18, "Criminal Law stipulates that kidnappers will be imprisoned.". It opens with In the corner, a girl in a black dress sat quietly, holding a glass of... and closes on Hurry home, what is a young lady like you doing running to a place like....
If you want the clearest chapter reference, go to Chapter 14. Early on, Lin Manru had a rare good night's sleep.; later, the chapter leans on After freshening up, she specifically went to Jiang Yan's room on the....
Chapter 656, "If he's the grandson of the richest man, then I am the richest man!", is the clearest early answer because it turns Pei Ye's situation into a concrete plot event.