Meng Xing looked at Qiu Si and grimaced when he saw that Qiu Si's face was wrinkled in disgust. Meng Xing can understand.
Qiu Si doesn't like Qiu Shiba. So, he calls him 'bastard' (wang ba) instead of 'shiba' (eighteen). Little does Qiu Si know that Qiu Shiba indeed has 'wang' on him. Because Meng Xing has guessed that Qiu Shiba is from the imperial palace (wang gong). As to whether he is from the imperial court, or the imperial family itself, the emperor – Jiang Yan, is tight-lipped while Lin Hao – who is the minister of personnel, is even more tight-lipped since Lin Hao and Meng Xing hates each other from the principle of 'like repels like'. (both of them are the same type of people)