About
Hejia Zhang is Editor-in-Chief of ShopBack's editorial team, covering consumer pricing, sale cycles, and retailer comparisons across Australia, Singapore, and the United States.
The reporting draws on ShopBack's internal merchant pricing data across thousands of retailers in the three markets, paired with primary sources: retailers' own sale histories, official promotional pages, and government statistics from the ABS, SingStat, and the BLS.
Areas of focus
Sale-cycle timing. Tracking when sales genuinely cut into margin versus when the markdown is theatre. The recurring annual cycle includes EOFY (June, AU), the Great Singapore Sale (June through August, SG), Singles' Day on November 11 (SG and increasingly AU), Black Friday and Cyber Monday (US, with growing AU and SG participation), Boxing Day (December 26, AU), and the major US weekends around Memorial Day, July 4th, and Labor Day.
Cross-retailer pricing. Same SKU compared across the field. In Australia that means Amazon AU, JB Hi-Fi, Harvey Norman, Officeworks, Big W, Kmart, plus Coles and Woolworths for groceries. In Singapore: Lazada, Shopee, Courts, Best Denki, FairPrice, Cold Storage. In the United States: Amazon, Walmart, Target, Best Buy, Costco.
Category playbooks. Running coverage on sneakers, beauty and skincare, consumer electronics, baby gear, travel, and groceries. Each playbook covers what to pay, when to pay it, and where the resale or open-box market sits twelve months on.
Cashback as a layer. How stacked cashback compares against credit-card rewards, store loyalty programs, and coupon stacking. The rules differ meaningfully across the three markets, so the coverage is written region by region rather than one size fits all.
Editorial standards
Every price reference in a Hejia Zhang article traces back to a primary source. That means the retailer's own site, the official sale page, government statistics from the ABS, SingStat, or the BLS, or ShopBack's internal merchant pricing data. It does not mean coupon aggregators, deal-listing sites, or third-party scrapers, none of which are cited.
For category playbooks (sneakers, beauty, electronics, baby gear), observed prices are checked against the actual in-cart price at the retailer during the article's coverage window, not the advertised banner. Travel and grocery pieces are verified against the booking flow or the basket total. Every number gets a date attached. The date_modified field at the top of each article reflects when those numbers were last re-verified, which happens at minimum every quarter.
Recommendations are conditional. "Best buy" is always stated for a particular reader under particular conditions, with the trade-offs at the top of the piece so readers can self-select. Errors get corrected in-article, with the date and the nature of the change noted at the top.
ShopBack receives a commission when readers complete a purchase through a cashback link. This commission does not vary by editorial coverage, and merchants cannot pay for inclusion, ranking, or favourable language. Where a merchant pays a notably higher commission than its peers on a comparable product, the conflict is disclosed inline. Editorial picks are not sold.
Get in touch
Tips, corrections, or merchant pricing data I should look at: hejia.zhang@shopback.com
Corrections are logged in-article with the date and what changed.
Editorial team
Hejia Zhang leads ShopBack's shopping editorial team and writes cross-vertical pieces on sale-cycle timing, cross-retailer pricing and the cashback layer. The other byline on the team:
- Garry Shi, Cashback Expert — ShopBack product expertise covering cashback, the wallet, ShopBack PayLater, stacking, and member features
Hejia Zhang and Garry cover complementary surfaces. Hejia Zhang is the outside-in editor (what to buy, when, where the cashback layer sits in a wider purchase decision); Garry is the inside-out editor (how the ShopBack product itself works once a shopper is using it).
Brands, work with us: garry@shopback.com.
Articles by Hejia Zhang
Costco Executive vs Sam's Club Plus vs BJ's Perks Rewards for US 2026: Which Warehouse Club Tier Pays for Itself
For US shoppers in 2026, Costco Executive ($130/yr) is the strongest reward rate at 2% capped at $1,250, Sam's Club Plus ($110/yr) has the best gas savings plus free shipping with Sam's Cash 2% capped at $750, and BJ's Club+ ($110/yr) wins on coupon stacking and East Coast grocery breadth. The break-even on the upgrade tier is roughly $3,250 of annual club spend for Costco and $3,000 for Sam's.
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Best US Credit Cards for Mexico 2026: No-FX, MXN Cash, Lounge Access
Which US credit card is best for a Cancun or wider Mexico trip in 2026? A practical comparison of Chase Sapphire Preferred, Capital One Venture X, Amex Gold, and Citi Premier on FX fees, MXN cash access, and total trip value.
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lululemon Align vs Wunder Train vs Fast and Free US 2026
For US shoppers in 2026, lululemon Align (Nulu) is the buttery yoga and lounge legging, Wunder Train (Everlux) is the compressive HIIT, spin, and lifting legging, and Fast and Free (Nulux) is the cool, pocketed running and cycling legging. Across a $98 to $138 retail band the decision is fabric, not price.
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Best No-FX Credit Cards for Japan 2026: Sapphire vs Venture X vs Platinum
Which US credit card is best for a Japan trip in 2026? A practical comparison of Chase Sapphire Preferred, Sapphire Reserve, Capital One Venture X, and Amex Platinum on FX fees, lounge access, IC card compatibility, and total trip value.
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New Balance 990 vs 993 vs 1906R in 2026: Heritage US Sneaker Buyer's Guide
For most US heritage-sneaker buyers in 2026, the New Balance 990v6 is the safest daily classic at around $200, the 993 wins as the all-day comfort middle-ground at around $200, and the 1906R is the streetwear-led Y2K silhouette at around $160. Made-in-USA premium pricing is the dividing line, not just style.
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Cancun in Hurricane Season: Should US Travellers Book a Trip Between June and November 2026?
Is it safe to travel to Cancun during hurricane season? A practical guide to risk windows, booking strategy, insurance choices, and refund posture for US travellers planning a June-November 2026 Cancun trip.
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Best US Credit Cards for Grocery and Gas in 2026: Stacking Strategy for Everyday Essentials
For a typical US household spending $500 to $700/month on groceries and $200 to $300/month on gas, the Amex Blue Cash Preferred ($95 fee, 6% grocery up to $6k, 3% gas) is the default winner, but only above the $1,584 annual grocery floor. Below that floor, Blue Cash Everyday (3% grocery, no fee) or a single-category 5% card like Citi Custom Cash beats it. A two-card layered setup that splits grocery and gas across separate issuers outperforms any single card for households spending over $9,000/year on these two categories combined.
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Nike Pegasus vs Vomero vs Invincible for US Runners in 2026: Cost Per Mile After Cashback
For most US runners in 2026, the Nike Pegasus 41 is the lowest cost-per-mile daily trainer at roughly $0.28 per mile over its useful life. The Vomero 18 wins for max-cushion daily mileage and heavier runners; the Invincible 3 wins for recovery days, easy runs, and walkers who want the softest ride Nike makes.
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The Best 14-Day Japan Itinerary from the US: Tokyo, Kyoto, Osaka, and Hiroshima in 2026
A practical 14-day Japan itinerary built for US travellers in 2026, Tokyo, Hakone, Kyoto, Osaka, and Hiroshima, with day-by-day plans, transport mode for each leg, hotel zones, and total budget in USD.
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The 5 Cards Most US Online Shoppers Overlook in 2026 (One Was Just Closed to New Applicants)
The best US no-annual-fee card for online shopping cashback in 2026 depends on where you shop. Amex Blue Cash Everyday wins for pure online retail (3% flat up to $6,000/year). Chase Freedom Flex and Discover It Cash Back win for quarterly bursts (5% on rotating categories, capped at $1,500/quarter) when an online-relevant category like Amazon is active. Citi Custom Cash wins for single-merchant loyalists (5% on the top category up to $500/billing cycle), though it closed to new applicants on 28 May 2026. The strongest setup is the Quarterly Rotation Stack: pair Chase Freedom Flex with Discover It Cash Back so at least one card is likely running a 5% category you can use through more of the year.
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