Customs procedures can significantly impact shipping time. Efficient handling and documentation can facilitate quicker clearance, reducing delays. Conversely, inadequate documentation or stringent inspections can lead to prolonged processing times. Both China and Sudan's customs regulations and the shipper's adherence to these rules play crucial roles.

Air shipping is generally more expensive due to its speed, often used for urgent or high-value goods. Costs vary based on weight and volume but can range from $5 to $10 per kilogram. Sea shipping is cheaper, ideal for bulk goods, with costs typically calculated per cubic meter or per container, ranging from $1,500 to $3,000 for a 20-foot container.

Common sea routes typically pass through major ports such as Shanghai or Shenzhen, through the Indian Ocean, and the Suez Canal, finally reaching Port Sudan. For air freight, major airports in China like Beijing or Shanghai connect through intermediate hubs before landing in Khartoum, Sudan's primary international airport.

Risks include potential delays due to customs, weather, and geopolitical issues. Damages or losses during transit, especially for sea freight, and fluctuating shipping costs are also concerns. Choosing reliable shipping partners and comprehensive insurance coverage can mitigate these risks.