Jǐngfāng / fāxiàn / zhè / qǐ / zhàpiàn / àn / shì / jǐ / gè / rén / shìxiān / hé / móu / shè / xià / de / tōng / tào。

警方发现，这起诈骗案是几个人事先合谋设下的通套。

The police discovered that the fraud was a scheme jointly devised by several people.