We need to produce JSON with fields: seo_title, summary, key_entities, expert_faq, internal_link_anchor, primary_keyword, secondary_keywords, content_type.

Word count 180-250 words across summary. Summary must be 3-4 paragraphs, each 45-65 words. Let's plan.

Paragraph 1: Introduce lawsuit, mention Susquehanna, $100 million profit, options trades. Aim 55-65 words.

Paragraph 2: Explain context: Chinese brokerage crackdown, CSRC action, impact on Futu and Tiger Brokers, share price drop. Also mention advance knowledge. Aim 55-65 words.

Paragraph 3: Conclude with implications: lawsuit seeks to unmask traders, freeze accounts, market impact, regulatory scrutiny. Aim 55-65 words.

Total words 180-250. Let's draft.

Paragraph 1 (55-65 words):

"Susquehanna International Group has lodged a federal lawsuit in New York, alleging that up to 100 anonymous traders pocketed more than $100 million by wagering on the decline of Chinese brokerages Futu and Tiger Brokers. The firm says the traders used advance notice of a regulatory crackdown to buy large blocks of bearish put options, netting outsized gains."

Count words: Let's count. "Susquehanna(1) International2 Group3 has4 lodged5 a6 federal7 lawsuit8 in9 New10 York,11 alleging12 that13 up14 to15 10016 anonymous17 traders18 pocketed19 more20 than21 $10022 million23 by24 wagering25 on26 the27 decline28 of29 Chinese30 brokerages31 Futu32 and33 Tiger34 Brokers.35 The36 firm37 says38 the39 traders40 used41 advance42 notice43 of44 a45 regulatory46 crackdown47 to48 buy49 large50 blocks51 of52 bearish53 put54 options,55 netting56 outsized57 gains58." That's 58 words. Good.

Paragraph 2 (55-65 words):

"On May 22, China’s securities regulator announced that Futu and parent company Up Fintech were operating without mainland licenses, triggering a sharp sell‑off in their Nasdaq‑listed shares. The timing of the options bets indicates the traders possessed insider information about the impending penalties, a claim Susquehanna