If the men with Rakshasa masks knew that their reaction revealed the plan of the 'Queen', they would have vomited blood and cursed Shenlian Yingyue with fury for being fooled by her.
It was the 'Queen's' plan. The 'Queen' was cautious, knowing that merely sending them would not be enough to kill Shenlian Yingyue and Shenlian Yinzhu, so she devised another strategy.
Although the 'Queen' calculated everything, the perfect plan failed because everyone around Shenlian Yingyue was incredibly intelligent and knowledgeable.
If the 'Queen' hadn't sent people with Rakshasa masks to kill Shenlian Yingyue and Shenlian Yinzhu in Golden Candle City that year, she would not have come into contact with these remarkable individuals.