Hmnn.. a good point ☝️ but 😂😂😂.

Isn't Russian connected by land to China? They (Russia) are the third and fourth (China) largest oil producers in the world. Both from within their own borders. The only current supplier of oil that would require a boat for delivery is from Brazil who supply only 6% of China's imported Oil (and possibly Angola). The rest are connected by land and easily accessible.

China's Top Providers of Imported Crude Oil

Saudi Arabia: US$39.9 billion (17.4% of China's crude oil imports)

Russia: $35.8 billion (15.6%)

Iraq: $23.5 billion (10.2%)

Oman: $20.2 billion (8.8%)

Angola: $17.3 billion (7.5%)

Kuwait: $14.1 billion (6.2%)

United Arab Emirates: $14 billion (6.1%)

Brazil: $13.8 billion (6%)