U.S. President Donald Trump on Wednesday said he could announce further tariffs on China similar to the 25% duties announced earlier on India over its purchases of Russian oil, depending on what happens.

Russian oil exporters are predicted to take in $153 billion this year, according to the Kyiv institute. Fossil fuels are the single largest source of budget revenue. The imports support Russia’s ruble currency and help Russia to buy goods from other countries, including weapons and parts for them.

US President Donald Trump’s administration has drawn criticism for imposing additional tariffs on India over its continued imports of Russian oil while letting China by far the largest purchaser of Russian energy off the hook.