Huangyan Mould has a total of more than 2,000 professional production points for moulds, and the number is relatively large. It is believed that there are four main types of operation of Huangyan mould enterprises: contract type, semi-contract type, self-produced type, and self-employed type. Huangyan Mould has a total of more than 2,000 professional production points for moulds, and the number is relatively large. It is believed that there are four main types of operation of Huangyan mould enterprises: contract type, semi-contract type, self-produced type, and self-employed type. Huangyan Mould has a total of more than 2,000 professional production points for moulds, and the number is relatively large. It is believed that there are four main types of operation of Huangyan mould enterprises: contract type, semi-contract type, self-produced type, and self-employed type. Huangyan Mould has a total of more than 2,000 professional production points for moulds, and the number is relatively large. It is believed that there are four main types of operation of Huangyan mould enterprises: contract type, semi-contract type, self-produced type, and self-employed type.