BENGALURU, India — Treasury Secretary Janet L. Yellen mentioned on Thursday that the USA would redouble its efforts to marshal international help to assist Ukraine and warned that China would face repercussions if it helped Russia evade American sanctions.

She spoke as prime policymakers from around the globe gathered in southern India for a gathering that’s anticipated to focus largely on accelerating a worldwide financial restoration after three years of worldwide crises. The warning to China underscores how the influence of the warfare continues to reverberate, straining ties between the world’s two largest economies as they have been trying to stabilize their relationship.

“We’ve made clear that offering materials help to Russia or help with any type of systemic sanctions evasion can be a really critical concern for us,” Ms. Yellen mentioned. “We will definitely proceed to clarify to the Chinese language authorities and the businesses and banks of their jurisdiction about what the foundations are relating to our sanctions and the intense penalties they’d face for violating them.”

Ms. Yellen declined to explain particular U.S. intelligence about Russian makes an attempt to keep away from sanctions, however the Treasury Division has pointed to makes an attempt by Russia to hunt help from China to produce it with gadgets, comparable to semiconductors, that face commerce restrictions.

Commerce knowledge reveals that China, together with nations together with Turkey and a few former Soviet republics, has stepped in to supply Russia with merchandise that civilians or armed forces may use, together with uncooked supplies, smartphones, automobiles and pc chips. Biden administration officers have expressed concern that China may present Russia with deadly weapons; nevertheless, China doesn’t seem to have performed so but.

The USA has cracked down on a few of the firms and organizations supplying items and providers to Russia. In January, it imposed sanctions on a Chinese language firm that had offered satellite tv for pc imagery to the Wagner mercenary group, which has performed a big function within the battle for japanese Ukraine. In December, it added two Chinese language analysis institutes to a listing of entities that provide the Russian navy, proscribing their entry to U.S. know-how.

On Thursday, Ms. Yellen made clear that the USA would crack down on sanctions evasion. “We’re looking for to strengthen sanctions and to verify we tackle violations of sanctions,” she mentioned.

The effectiveness of sanctions on Russia continues to be a topic of intense debate, as current forecasts from the Worldwide Financial Fund steered that its financial system was performing higher than anticipated.

However Ms. Yellen provided a darkish evaluation of Russia’s financial system, arguing that sanctions imposed by the USA and different Western nations have been working to isolate the Kremlin, drain the nation of expertise and sap its productive capability. Nonetheless, the USA continues to view the battle as the most important risk to the worldwide financial system, and Ms. Yellen made clear that the Biden administration is ready to proceed punishing Russia for its incursion.

Ms. Yellen mentioned that the USA deliberate to unveil further sanctions on Russia and that it was working with its allies to plot methods to tighten restrictions already in place.

“We are going to stand with Ukraine in its struggle — for so long as it takes,” Ms. Yellen mentioned at a information convention as finance ministers from the Group of 20 nations, which embody Russia and China, convened for 2 days of conferences.

The Treasury secretary mentioned that the USA had already offered greater than $46 billion in safety, financial and humanitarian help to Ukraine and that one other $10 billion in financial help can be delivered within the coming months. Ms. Yellen additionally known as on the I.M.F. to “transfer swiftly” with a totally financed mortgage package deal for Ukraine. The I.M.F. final yr permitted greater than $1 billion in emergency financing to Ukraine to mitigate the financial influence of the warfare.

“Continued, sturdy help for Ukraine can be a significant subject of dialogue throughout my time right here in India,” Ms. Yellen mentioned.

The USA hopes to incorporate a condemnation of Russia’s actions in Ukraine within the joint assertion, or communiqué, that the finance ministers are set to launch this week. Nevertheless, it’s not clear if a decisive assertion can be attainable as a result of Russia is a member of the Group of 20 and India, which is internet hosting the occasion, continues to purchase giant portions of Russian oil.

Regardless of the urgency to handle the disaster in Ukraine, Ms. Yellen provided an upbeat evaluation of the worldwide financial system, which has begun to get well. Whereas she acknowledged that headwinds remained, she mentioned the world was on extra secure footing than final fall, when many have been forecasting a worldwide recession.

“It’s honest to say that the worldwide financial system is in a greater place right now than many predicted just some months in the past,” Ms. Yellen mentioned, pointing to a current international development improve from the I.M.F.

She added that the USA financial system was proving to be resilient, with inflation moderating whereas the labor market stays sturdy.

Throughout their conferences on Friday and Saturday, finance ministers are additionally anticipated to debate methods to alleviate the debt crises going through many growing nations. Officers are additionally anticipated to place stress on China, which has turn out to be one of many world’s largest collectors, to exhibit extra willingness to let extra nations restructure their debt.

“I’ll proceed to push for all bilateral official collectors, together with China, to take part in significant debt remedies for growing nations and rising markets in misery,” Ms. Yellen mentioned.

It was unclear if she would have any conferences with Chinese language officers this week. She mentioned that holding strains of communication open about macroeconomic points remained necessary.

“I actually count on that we’ll resume discussions,” Ms. Yellen mentioned, including, “I don’t have a particular time-frame in thoughts, however I feel it’s necessary to take action.”

Ana Swanson contributed reporting from Washington.