Grand Dynasty Yumcha and Seafood Restaurant

3,059 of 3,059 reviews · 100% coverage · googleReviewsChecker

High manipulation risk

Reviews fetched

3,059/3,059

Displayed avg

4.78

Trust-adjusted rating

4.5

Credible-reviewer 1★ rate

3.3%

Boost score

88.4/100

Campaign-like reviews

55.4%

Outside flagged months

44.6%

5★ from ≤2-review accts

26.4%

Busiest day

Local Guides

30%

Why this boost score?

Campaign-like months contribute to the risk verdict, while the rating remains based only on observed credible-reviewer evidence. Elevated risk begins at 35/100.

Signal	Observed	Points
5★ from ≤2-review accounts	809 reviews (26.4%)	28.3/30
Reviews on burst days	1095 reviews on 93 days (35.8%)	35/35
Peak/median monthly ramp	13.1×	13.4/20
Tightest five-minute cluster	10 reviews	11.7/15
Total		88.4/100

Reviews per month by star rating

stack height = total reviews · gaps = zero-review months · outlined stacks = non-seasonal campaign-like months

Reviews per day (recent)

shows the 160 most recent active review dates; scoring uses the full dated history · red = burst day (≥8)

Credible reviewers — the quality test

Reviewer pool	Rating	1★ rate	≤3★ share
All reviews	4.78	2.6%	5.6%
Veteran (≥20)	4.572	3.1%	10.6%
Veteran (≥50)	4.572	2.5%	10.4%
Most experienced (≥100) — estimate basis	4.534	1.7%	12.1%
Local Guides	4.593	3.3%	10.2%
Credible union (Local Guide or ≥20)	4.593	3.3%	10.2%
Credible outside campaign-like months	4.54	3.2%	11.4%

Rating distribution

Non-seasonal campaign-like months (12)

Each month is compared with the same calendar month in other years; ≥90% 5★ distinguishes positive campaigns from ordinary busy or complaint-heavy months.

Month	Reviews	Other-year median	YoY ratio	5★	Mean
2026-07	235	13	18.1×	96.6%	4.92
2026-06	213	20	10.7×	97.2%	4.92
2025-04	184	19	9.7×	95.1%	4.9
2026-04	165	19	8.7×	97%	4.92
2026-05	155	15	10.3×	98.1%	4.94
2025-12	147	21	7×	93.9%	4.8
2026-01	124	20	6.2×	95.2%	4.88
2025-05	117	15	7.8×	100%	5
2026-03	102	9	11.3×	98%	4.94
2026-02	94	12	7.8×	93.6%	4.82
2025-06	83	20	4.2×	97.6%	4.9
2025-08	76	16	4.8×	100%	5

Burst days (≥8/day)

Day	Reviews
2026-07-12	45
2026-06-28	23
2025-05-03	23
2025-04-21	19
2026-07-10	18
2025-04-11	18
2026-06-06	17
2026-06-02	17
2026-07-11	16
2026-06-19	16
2026-06-05	16
2026-05-24	16
2026-04-22	16
2026-04-18	16
2026-01-11	15
2025-08-24	15
2025-04-25	15
2026-07-19	14
2026-01-18	14
2026-08-01	13

Generated by googleReviewsChecker analysis v7 from the Newest-sorted Google Maps feed (100% headline coverage) · fetched 8/3/2026, 2:30:59 AM. Campaign-like months require ≥max(12, 3× active-month median, 2× same-calendar-month median in other years) reviews and ≥90% 5★. A high-risk campaign verdict requires those months to hold ≥40% of all reviews, ≥90% timestamp coverage, ≥12 active months, and ≥100 dated reviews including ≥30 credible reviews outside them. A contiguous ≥12-month high-volume regime is not escalated when ≥80% of flagged months fall inside it, ≥30 credible reviews agree within 0.2★, and burst share is ≤5%. Risk signals select among observed credible cohorts but never assign flagged reviews an invented star value. Indicators, not proof.