TOPKO PRODUCTION GROUP LTD, an exporter of cork and rubber‑based products, shows a modest but steady pattern of shipments from Shanghai (and occasionally Ningbo) to major West Coast US ports such as Long Beach, Los Angeles, Seattle and Tacoma. Over the last 18 months it recorded eight shipments, typically 1–2 TEU per run, averaging 1.8 t each, and repeatedly supplied JAAMB ENTERPRISE LLC with cork wedges and related items under HS 450190/450410. For buyers this indicates a reliable niche supplier with a focused product portfolio and a consistent partner base, suggesting dependable delivery windows for West Coast demand. Customs brokers will note the regular use of a limited set of HS codes, uniform loading ports and predictable unload locations, which translates into streamlined documentation, stable routing and generally smooth clearance performance.