In June of this year, the company contracted 4,500 mu of outer tidal flats. After scientific demonstration, various types of breeding seeds were put on the tidal flats on August 12, 13 and 18 respectively. Among them, American round clams: 110 million; variegated clams: 1,200 jins; single-ringed spiny scorpion: 38.6 million; Nereus: 275 million. .