Chinese Steamed Cracked Crabs

• 2 green onions
• 1 crab
• 1,900 gr sized of ginger
• 75 ml vinegar
• 50 ml peanut oil
• 30 gr green onion (finely shredded)
• 30 gr ginger (finely shredded)
• 16 ml shao hsing wine
• 1 gr sugar
• 1 gr salt